World list of plant breeders :    supplement to list of plant breede rs in Canada and the United States of America :    a reference list of classified information giving the addresses and activities of plant bre eders in these countries. 

 - Washington,    1949. 
 - iii,105 p.    28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Plant breeding -- Directories.