Hays, W. M.  1859-1916. <br/><br/>
Plant breeding. 
By Willet M. Hays. 
 - Washington,  Govt. print. off.,  1901. 
 - 72 p.  illus., VI pl.  23 cm. 
 - U. S. Dept. of agriculture. Division of vegetable physiology and pathology. Bulletin  no. 29 .
<br/><br/><label>LCCN: </label>agr09000245  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant breeding.
<br/><br/><label>LC Class. No.: </label>SB623  / .A2 no. 29