Oesterreichische botanische Zeitschrift (A. Skofitz, 1908)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1909)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1910)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1912)

Official guide to the museums of economic botany. No. 2, Monocotyledons and cryptogams (Printed for H.M. Stationary Off. by Eyre and Spottiswoode, 1895)

Öfversigt af Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1903)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1909)

Ohio mycological bulletin - Ohio State University. (Ohio State University, 1903)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1911)

L'Oiseau et la Revue francaise d'ornithologie - Société ornithologique de France. (Société ornithologique de France, 1988)

On the biology of Fomes applanatus (Pers.) Wallr - White, J. H. (James Herbert), 1957 (University of Toronto Press, 1919)

The Orchadian - Australasian Native Orchid Society (The Society, 1968)

The Orchadian - Australasian Native Orchid Society (The Society, 1963)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1907)

Oxidation-reduction potentials in bacteriology and biochemistry - Hewitt, L. F. (Williams and Wilkins, 1950)

Pacific science - University of Hawaii. (University Press of Hawaii, 1967)

Pacific silver fir : a bibliography with abstracts - Williams, Carroll B. (Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1965)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1907)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1916)

[Pamphlets on agriculture in Guam] (s.n, 1905)

Papers presented at the Celebration of the Twentieth Anniversary of the New York Botanical Garden, September 6-9, 1915. Published by the aid of the David Lydig Fund, bequethed by Charles P. Daly - New York Botanical Garden (1916)

I parassiti vegetali delle piante coltivate od utili - Ferraris, Teodoro. (Sineo & Bo, 1913)

Part I. The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling news litho. co, 1913)

A pathological survey of the Para rubber tree (Hevea brasiliensis) in the Amazon Valley - Weir, James R. (James Robert), 1882 -1943 (U.S. Dept. of Agriculture, 1926)

Patologia vegetale. Fanerogame parassite, mixomiceti, bacterii, ifomiceti od eumiceti (funghi) - Voglino, Pietro. (Unione tipografico-editrice [Gia ditta Pomba e c], 1905)

Pesticide products classified in Ontario - Ontario. Ministry of the Environment. (Ministry of the Environment], 1994)

Pesticide products classified in Ontario - Ontario. Ministry of the Environment. (Ontario Ministry of the Environment, 1984)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)