Planet earth  readings from Scientific American / 
with introduction by Frank Press, Raymond Siever. 
 - San Francisco :  W. H. Freeman ,  1974. 
 - 303 p. :  ill. ;  28 cm. 
 - Scientific American .
<br/><br/>p. 293-297 
<br/><br/><label>ISBN: </label>0716705079 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Earth sciences--Addresses, essays, lectures<br/> Force and energy--Addresses, essays, lectures<br/> Pollution--Addresses, essays, lectures