Free, John Brand <br/><br/>
Insect pollination of crops / 
by John B. Free 
 - London :  Academic Press ,  1970 
 - xi,544 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and indexes 
<br/><br/><label>ISBN: </label>012266650X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilization of plants by insects<br/>Field crops