International and national outlook-the necessity for efficient nutrient utilization : proceedings of a symposium
· sponsored by Divisions S-4, S-8, A-4, and A-6 of the American Society of Agronomy and Soil Science Society of America ; coeditors: Noble R. Usherwood, Eugene C. Doll ; editor-in-chief: Matthias Stelly ; managing editor: David M. Kral ; assistant editor: Linda C. Eisele
Bok Engelsk 1975