TY  - BOOK
AU  - Gustafson,A.F.
TI  - Conservation of the soil,
T2  - McGraw-Hill publications in the agricultural and botanical sciences, E. W. Sinnott, consulting editor
U1  - 631.45 23
PY  - 1937///
CY  - New York and London
PB  - McGraw-Hill
KW  - Erosion
KW  - Soils
KW  - United States
N1  - Bibliography at end of some of the chapters
ER  -