Aphids of the Rocky Mountain region, including primarily Colorado and Utah, but also a bordering area composed of southern Wyoming, southeastern Idaho and northern New Mexico - Palmer, Miriam Augusta, 1878 - (Hirschfield Press], 1952)

Appendices A-E : terrestrial resources injury assessment report : upper Clark Fork River NPL sites - Lipton, Joshua. (Dept. of Justice?, 1995)

Appendix C., vegetation/agricultural resources of the Beal Project area - Culwell, L. Dean. (Western Technology and Engineering, 1988)

Aquatic and wetland plants of southwestern United States - Correll, Donovan Stewart, 1908 -1983 (Environmental Protection Agency; [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1972)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 1988)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2002)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2015)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2016)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2017)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2018)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2019)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2021)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2022)

An arboreal guide of the wilderness - Burch, Ida Hay (1979)

The Arboretum bulletin - Arboretum Foundation (Seattle, Wash.) ([University of Washington, 1944)

The Arboretum bulletin - Arboretum Foundation (Seattle, Wash.) ([University of Washington, 1945)

The Arboretum bulletin - Arboretum Foundation (Seattle, Wash.) ([University of Washington, 1950)

Arboretum bulletin of the associates - University of Pennsylvania. Morris Arboretum. (The Morris Arboretum of the University of Pennylvania, 1937)

Arboriculture - International Society of Arboriculture. (International Society of Arboriculture, 1902)

Archiv der Pharmazie - Deutscher Apotheker-Verein. (Deutscher Apotheker-Verein, 1861)

Archiv der Pharmazie - Deutscher Apotheker-Verein. (Deutscher Apotheker-Verein, 1889)

Archiv der Pharmazie - Deutscher Apotheker-Verein. (Deutscher Apotheker-Verein, 1857)

Archiv des Vereins der Freunde der Naturgeschichte in Mecklenburg... - Verein der Freunde der Naturgeschichte in Mecklenburg. (Opitz and Company, 1892)

Archiv für Naturgeschichte. Abteilung B (Nicolai, 1914)

Archiv für Naturgeschichte. Abteilung B (Nicolai, 1917)

Archiv für Naturgeschichte (Nicolai, 1855)

Archiv für Naturgeschichte (Nicolai, 1904)

Archiv für Naturgeschichte (Nicolai, 1905)

Archiv für Naturgeschichte (Nicolai, 1911)

Archives des sciences physiques et naturelles (A. Cherbuliez, 1878)

The Arctic prairies : a canoe-journey of 2,000 miles in search of the caribou : being the account of a voyage to the region north of Aylmer lake - Seton, Ernest Thompson, 1860 -1946 (Constable, 1912)

The Arctic prairies, a canoe-journey of 2,000 miles in search of the caribou; being the account of a voyage to the region north of Aylmer Lake - Seton, Ernest Thompson, 1860 -1946 (C. Scribner's Sons, 1911)

The Arctic prairies : a canoe-journey of 2,000 miles in search of the caribou; being the account of a voyage to the region north of Aylmer Lake - Seton, Ernest Thompson, 1860 -1946 (W. Briggs, 1911)

The Arctic prairies; a canoe-journey of 2,000 miles in search of the caribou; being the account of a voyage to the region north of Aylmer Lake - Seton, Ernest Thompson, 1860 -1946 (C. Scribner's sons, 1911)

Arctic searching expedition: a journal of a boat-voyage through Rupert's Land and the Arctic Sea, in search of the discovery ships under command of Sir John Franklin. With an appendix on the physical geography of North America - Richardson, John, Sir, 1787 -1865 (Longman, Brown, Green, and Longmans, 1851)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1950)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1953)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1963)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1972)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1973)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1985)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1993)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1994)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1955)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 1996)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 2011)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 2012)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 2014)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 2016)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 2018)

Arnoldia - Arnold Arboretum. (Arnold Arboretum, Harvard University, 2019)

The art & craft of garden making - Mawson, Thomas Hayton, 1861 -1933 (B.T. Batsford, 1912)

L'art des jardins : traité général de la composition des parcs et jardins - André, Edouard François, 1840 -1911 (G. Masson, 1879)

The Asa Gray bulletin - McVaugh, Rogers, 1909 - (1952)

The Asa Gray bulletin - Shear, C. L. (Cornelius Lott), 1865 -1956 ([Gray Memorial Botanical Chapter], 1899)

The Asa Gray bulletin - McVaugh, Rogers, 1909 - (1953)

Aspen community types of the Intermountain Region - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1988)

Aspen community types of Utah - Intermountain Research Station (Ogden, Utah) (USDA Forest Service, Intermountain Research Station, 1986)

Aspen in the central Rocky Mountain region - Baker, Frederick Storrs, 1890 -1965 (U.S. Dept. of Agriculture, 1925)

Aspen management guidelines for BLM lands in north-central Nevada : final report - United States. Bureau of Land Management. (Battle Mountain Field Office, Bureau of Land Management, 2003)