TY  - BOOK
AU  - Gustafson,A.F.
TI  - Conservation in the United States
AV  - HC106.3 .G885 1949
U1  - 333.72 
PY  - 1949///
CY  - Ithaca, N.Y.
PB  - Comstock Pub. Co.
KW  - Natural resources
KW  - United States
KW  - Economic conditions
N1  - "Suggestions for supplementary reading": p. [513]-520
ER  -