Heinrich, Bernd,  1940 <br/><br/>
Bumblebee economics / 
Bernd Heinrich 
 - Cambridge, Mass. :  Harvard University Press,  1979 
 - viii, 245 p. :  ill. ; 24 cm. 
<br/><br/>Includes bibliographical references (p.  221 -230) and index 
<br/><br/><label>ISBN: </label>0674085809 
<br/><br/><label>LCCN: </label>78-23773 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bumblebees--Ecology<br/>Bioenergetics<br/>Insects--Ecology