Ohr, H. D. books & textbook
Compendium of Tropical Fruit Diseases (The Disease Compendium Series of the American Phytopathological Society)
Ploetz, Randy C. Zentmyer, George A. Nishijima, W. T. Rohrbach, K. G. Ohr, H. D.
Amer Phytopathological Society /1994T Paperback / 118 Pages
isbn-10: 0890541620 / isbn-13: 9780890541623
