Isaac, Leo Anthony ,  1892- <br/><br/>
Better Douglas fir forests from better seed / 
Leo Anthony Isaac. 
 - Seattle :  University of Washington Press,  1949. 
 - 64 p. :  ill. ;  23 cm. 
 - Agnes H. Anderson research publications. .
<br/><br/> "Literature cited": p.61-64. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Douglas fir
<br/><br/><label>Dewey Class. No.: </label>P 634.9754 I81