TY  - BOOK
AU  - Coffey,George Nelson
TI  - A study of the soils of the United States
AV  - S591 .A12 no. 85
PY  - 1912///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Soils
KW  - United States
N1  - Bibliography: p. 100-114
ER  -