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Contributions from the Botanical Laboratory of the University of Pennsylvania - University of Pennsylvania. Botanical Laboratory. (University of Pennsylvania Press, 1892)

Contributions from the Botanical Laboratory of the University of Pennsylvania - University of Pennsylvania. Botanical Laboratory. (University of Pennsylvania Press, 1898)

Contributions from the Laboratory of Plant Genetics - Bussey Institution. ([s.n.], 1909)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1897)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1901)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1903)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1905)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1908)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1919)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1931)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1957)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 2003)

Contributions from the University of Michigan Herbarium - University of Michigan. University Herbarium. (University Herbarium, University of Michigan, 1939)

Contributions from the University of Michigan Herbarium - University of Michigan. University Herbarium. (University Herbarium, University of Michigan, 1980)

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Contributions to the flora of Iowa; a catalogue of the phaenogamous plants - Arthur, Joseph Charles, 1850 -1942 (Intelligencer Book Print, 1876)

Contributions to the natural history of the Bermudas Vol. I - Goode, G. Brown (George Brown), 1851 -1896 (Govt. print. off, 1884)

The control of tomato leaf-spot - Pritchard, Frederick John, 1874 -1931 (U.S. Dept. of Agriculture, 1924)

Control of woody weeds: some physiological aspects - Woods, Frank W. (Southern Forest Experiment Station, Forest Service, U.S. Forest Service, 1955)

Cooperative economic insect report - United States. Bureau of Entomology; Plant Quarantine. (Plant Protection and Quarantine Programs Animal and Plant Health Service, 1966)

Cooperative economic insect report - United States. Bureau of Entomology; Plant Quarantine. (Plant Protection and Quarantine Programs Animal and Plant Health Service, 1951)

Cooperative economic insect report - United States. Bureau of Entomology; Plant Quarantine. (Plant Protection and Quarantine Programs Animal and Plant Health Service, 1974)

Cooperative economic insect report - United States. Bureau of Entomology; Plant Quarantine. (Plant Protection and Quarantine Programs Animal and Plant Health Service, 1975)

Cooperative economic insect report - United States. Bureau of Entomology; Plant Quarantine. (U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1951)

Cooperative plant pest report - United States. Animal; Plant Health Inspection Service. (The Service, 1976)

Corn breeding - Richey, Frederick D. (Frederick David), 1884 - (U.S. Dept. of Agriculture, 1927)

The corn crops: a discussion of maize, kafirs, and sorghums as grown in the United States and Canada - Montgomery, E. G. (Edward Gerrard), 1878 - (Macmillan, 1920)

The corn crops: a discussion of maize, kafirs, and sorghums as grown in the United States and Canada - Montgomery, E. G. (Edward Gerrard), 1878 - (The Macmillan company, 1913)

Corn culture - Potter, Harry B. (Correspondence Coll. of Agric, 1910)

Corn; growing, judging, breeding, feeding, marketing - Bowman, Melville Le Roy, 1881 - (Sold by Waterloo publishing co, 1915)

Corn; growing, judging, breeding, feeding, marketing; for the farmer, student and teacher of agriculture, a textbook for agricultural colleges and high shcools - Bowman, Melville Le Roy, 1881 - (Sold by Waterloo publishing co, 1915)

Corn; growing, judging, breeding, feeding, marketing; for the farmer and student of agriculture, a text-book for agricultural colleges and high schools - Bowman, Melville Le Roy, 1881 - (The authors, 1908)

Corn smut caused by Ustilago maydis - Christensen, J. J. (Jonas Jergon), 1892 -1964 (American Phytopathological Society, 1963)

Cosmos : revista ilustrada de artes y ciencias (Impr. y Fotocolografía del Cosmos, 1892)

Cottage gardener and country gentleman's companion (Wm. S. Orr, 1854)

Cotton-integrated pest management : proceedings of a symposium, September 3-9, 1990, Alma-Ata, Kazakhstan - Alimukhamedov, Sultan N. (United States Department of Agriculture, Agricultural Research Service, 1992)

The crop book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Chas. H. Lilly Co, 1911)

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Crop production research - United States. Agricultural Research Service. (The Service, 1980)