Willemstein, S. C. <br/><br/>
An evolutionary basis for pollination ecology 
by S. C. Willemstein 
 - Leiden  E. J. Brill  1987 
 - 425 p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>9004084576 
<br/><br/><label>LCCN: </label>87-012833 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Insects--Evolution<br/>Insects--Food<br/>Insects--Ecology<br/>Botany--Ecology