Agricultural ethics : issues for the 21st century : proceedings of a symposium sponsored by the Soil Science Society of America, American Society of Agronomy, and the Crop Science Society of America in Minneapolis, MN, Oct. 31-Nov. 5, 1992
· organized by Division S-3 (Soil Biology and Biochemistry) ; editoral committee Peter G. Hartel, Kathryn Paxton George, James Vorst ; managing editor David M. Kral ; associate editor Pamm Kasper
Bok Engelsk 1994