TY  - BOOK
AU  - Duffey,Eric
TI  - Conservation of nature
SN  - 0070180156
PY  - 1970///
CY  - London
PB  - Collins
KW  - Conservation of natural resources
KW  - Juvenile literature
N1  - Bibliography: p. 126
N2  - Describes how man through farming, industry, clearance of forests, and population growth began to change the earth and bring about critical shortages of natural resources
ER  -