Barkley, W. D., & Martin, A. C. (1961). Seed identification manual. Oxford and IBH publishing.
Chicago Edition CitationBarkley, W D., and A C. Martin. Seed Identification Manual. New Delhi: Oxford and IBH publishing, 1961.
MLA Edition CitationBarkley, W D., and A C. Martin. Seed Identification Manual. Oxford and IBH publishing, 1961.
Warning: These citations may not always be 100% accurate.