Earth : the stuff of life /
Bear, Firman E. (Firman Edward), 1884-1967
Earth : the stuff of life / by Firman E. Bear second edition, revised by H. Wayne Pritchard and Wallace E. Akin - 2nd. ed. - Norman : University of Oklahoma Press, 1986 - 318 p. : ill., maps ; 22 cm.
p. 303-308
0806120029
Soils
Soils--United States
Soils conservation
Soils conservation--United States
Earth : the stuff of life / by Firman E. Bear second edition, revised by H. Wayne Pritchard and Wallace E. Akin - 2nd. ed. - Norman : University of Oklahoma Press, 1986 - 318 p. : ill., maps ; 22 cm.
p. 303-308
0806120029
Soils
Soils--United States
Soils conservation
Soils conservation--United States