TY  - BOOK
TI  - Planet earth: readings from Scientific American 
SN  - 0716705079
PY  - 1974///
CY  - San Francisco
PB  - W. H. Freeman
KW  -  Earth sciences
KW  - Addresses, essays, lectures
KW  -  Force and energy
KW  -  Pollution
N1  - p. 293-297
ER  -