Helfrich, Harold W, ed. Symposium on "issues in environmental crisis" Yale school of forestry <br/><br/>
Environmental crisis  man's struggle to live with himself 

 - New Haven  Yale university press  1970 
 - x, 187 p.; 20cm. 
<br/><br/><label>ISBN: </label>300013132 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental control<br/>Environmental policy<br/>Environmental protection<br/>Environmental sciences