Free, John B. <br/><br/>
Insect pollination of crops 

 - London :  Academic Press,  1970 
 - 544 p.  : ilus. 
<br/><br/><label>LCCN: </label>59705 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas--Fertilización.<br/>Polinización.
<br/><br/><label>Dewey Class. No.: </label>581.1662  / F7