Crops as sources of nutrients for humans : proceedings of a symposium
· sponsored by divisions S-4 and C-6 of the Soil Science Society of America, Crop Science Society of America, and the American Society of Agronomy in Anaheim, Calif., 28 Nov.- Dec. 1982 ; editorial committee R.M. Welch, W.H. Gabelman ; managing editor David M. Kral ; assistant editor Sherri L. Hawkins
Bok Engelsk 1984