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Soils in relation to crop growth
editor: Firman E. Bear
Bok Engelsk 1965
Chemistry of the soil
edited by Firman E. Bear
Bok Engelsk 1964
Earth : the stuff of life
by Firman E. Bear
Bok Engelsk 1962
Chemistry of the soil
edited by Firman E. Bear
Bok Engelsk 1955
Soils, their physics and chemistry
A. N. Puri ; with a foreword by Firman E....
Bok Språk ikke angitt 1949
Soils and fertilizers
by Firman E. Bear ..
Bok Engelsk 1947