William R. Jackson
United States. Soil Conservation Service.
Unknown Author
J. D. Dolman
Alonso López Hoyos
Andrew Russell Aandahl
Canada. Agriculture Canada. Research Branch
Ian Keith Nicholson
George Newmarch
Robin L. Miller
Kerstin Berglund
Tie, Yiu Liong.
J. Paul Lilly
A. Eagle
G. W. Wendel
F. S. Browne
Organic Soils Mapping and Interpretations Workshop (1981 Fredericton, New Brunswick)