TY  - BOOK
AU  -  Smith,Guy Harold
TI  -  Conservation of natural resources / 
U1  -  333.72 SMI 
PY  - 1958///]
CY  -  New York : 
PB  -  Wiley, 
KW  -  Natural resources
KW  -  United States
KW  -  Economic conditions
N1  -  Includes bibliographical references
ER  -