George W. Ware
Francis A. Gunther
Gary M Pierzynski
Eric Lichtfouse
Joseph C Jenkins
Stephanie Fiorenza
Ibrahim Mirsal
Roy Luther Donahue
NATO Advanced Study Institute on Iron in Soils and Clay Minerals (1985 Bad Windsheim, Germany)
Rattan Lal
Alexandra Toland
Rodelio B. Carating
Manuel Casanova
Damien J. Field
P. M. Huang
Unknown Author
Peter Charman
United States. Bureau of Agricultural Engineering. Library
Arieh Singer