Conservation of renewable natural resources  some fundamental aspects of the problem 
by Raphael Zon [and others] 
 - Port Washington  Kennikat Press  [1969, c1941] 
 - vi, 200 p.  illus., maps.  25 cm. 
 - Morris Arboretum monographs, 2 Essay and general literature index reprint series .
 - Pennsylvania.  University.  Morris Arboretum.  Monographs  2 .
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>68026200 //r86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation of natural resources--United States.<br/>Ozone--Physiological effect.<br/>Botany--United States.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Climate.
<br/><br/><label>LC Class. No.: </label>S942  / .P45 1969 
<br/><br/><label>Dewey Class. No.: </label>333.7/2/0973