McGregor, Samuel Emmett <br/><br/>
Insect pollination of cultivated crop plants / 
Samuel Emmett McGregor 
 - Washington, D.C. :  USDA ,  1976 
 - viii, 411p. :  ill. ;  30 cm. 
 - Agricultural handbook .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollination by insects<br/>Plants, Cultivated<br/>Agricultural economics<br/>Insects
<br/><br/><label>Dewey Class. No.: </label>632.7  / MCG