Proceedings of a symposium - Papendick, R. I.,; Sanchez, P. A.,; Triplett, G. B.,; Allmaras, R. R.,; Carlson, G. R.,; Myhre, D. H.,; Stelly, Matthias,; Kral, David M.,; Eisele, Linda C.,; Nauseef, Judith H., (American Society of Agronomy ; Crop Science Society of America ; Soil Science Society of America, 1976)
ASA Special Publication Number 27