"Proceedings of a symposium sponsored by Divisions S-1, S-2, S-3, S-9, and A-5 of the Soil Science Society of America and the American Society of Agro...
"Proceedings of a symposium sponsored by Divisions S-1, S-2, S-3, S-9, and A-5 of the Soil Science Society of America and the American Society of Agronomy in Atlanta, GA, 30 Nov. and 1 Dec. 1987."