The pinetum Britannicum : a descriptive account of hardy coniferous trees cultivated in Great Britain - Ravenscroft, Edward, 1816 -1890 (W. Blackwood & Sons, 1884)

Pinus contorta X banksiana hybrids tested in northern Rocky Mountains - Intermountain Forest; Range Experiment Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest & Range Experiment Station, 1970)

Piperacearum clavis analytica - Candolle, Casimir de, 1836 -1918 (Conservatoire Botanique, 1923)

Plant materials for use on surface-mined lands in arid and semiarid regions - United States. Soil Conservation Service. (Soil Conservation Service : for sale by the Supt. of Docs., U.S. G.P.O, 1982)

Plants of the Arizona chaparral - Carmichael, R. S. (Robert S.) (Rocky Mountain Forest and Range Experiment Station, 1979)

The plum in Kansas, with a chapter on the prune. How to grow them - Barnes, William H. (W. Y. Morgan, state printer], 1900)

Poole's Seed & Implement Co. [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Poole's Seed & Implement Co, 1926)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1894)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1872)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1897)

Popular studies of California wild flowers - Rice, Bertha Marguerite. (Upton bros. & Delzelle, 1920)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1968)

A preliminary survey of the bats of the Deerlodge National Forest Montana : 1991 - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1993)

A preliminary verified list of plant collectors in Mexico - Knobloch, Irving W. (Irving William), 1907 - (Harold N. Moldenke and Alma L. Moldenke, 1983)

Price list : fall 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.J. Weber & Sons Nursery Co, 1928)

Price list of Eastern Nurseries, Inc. : spring, 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Eastern Nurseries, 1927)

Price list of Eastern Nurseries, Incorporated : Spring, 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Eastern Nurseries, 1925)

Principal forage plants of Southwestern ranges - Judd, Benjamin Ira, 1904 - (Rocky Mountain Forest and Range Experiment Station, 1962)

The principal navigations, voyages, traffiques & discoveries of the English nation made by sea or over-land to the remote and farthest distant quarters of the earth at any time within the compasse of these 1600 yeeres - Hakluyt, Richard, 1552? -1616 (J. MacLehose and sons, 1904)

Principal range plants of the central and southern Rocky Mountains : names and symbols - Nickerson, Mona F. (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1976)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1890)

Proceedings of the 6th International Conference on Coelenterate Biology : the Leeuwenhorst, Noordwijkerhout, the Netherlands, 16-21 July 1995 - Ofwegen, L. P. van (Leendert P.), 1953 - (Nationaal Natuurhistorisch Museum, 1997)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1909)

Proceedings of the annual convention of the society of American Florists - Society of American Florists; Ornamental Horticulturists. (Society of American Florists and Ornamental Horticulturalists, 1885)

Proceedings of the ... annual meeting of the Florida State Horticultural Society - Florida State Horticultural Society. Meeting. (The Society, 1901)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1899)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1938)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1940)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1978)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1979)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1981)

Proceedings of the California Academy of Natural Sciences - California Academy of Natural Sciences (The Academy, 1863)

Proceedings of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1873)

Proceedings of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1875)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1916)