A study of the soils of the United States.
Coffey, George Nelson, 1875-
A study of the soils of the United States. - Washington, Govt. Print. Off., 1912. - 114 p. fold. map. (in pocket) 23 cm.
Bibliography: p. 100-114.
agr12002015
Soils--United States.
S591 / .A12 no. 85
A study of the soils of the United States. - Washington, Govt. Print. Off., 1912. - 114 p. fold. map. (in pocket) 23 cm.
Bibliography: p. 100-114.
agr12002015
Soils--United States.
S591 / .A12 no. 85