TY  - BOOK
AU  - Cooper, William S
AU  - Pearson, Gustaf A
AU  - Shantz, Homer L
AU  - Zon, Raphael
TI  - Conservation of renewable natural resources
CY  - New York
KW  - Climatic cycles
KW  - forest problem
KW  - Natural resources - United States
KW  - Natural vegetation
ER  -