Penchef, Esther <br/><br/>
four horsemen  pollution, poverty, famine, violence 

 - San Franscisco  Canfield press  1971 
 - ix, 412p.; 24cm. 
<br/><br/><label>ISBN: </label>63867303 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology<br/>Human environment<br/>Human geography<br/>Pollution<br/>Poverty