Faegri, Knut. <br/><br/>
The principles of pollination ecology, 
by K. Faegri and L. van de r Pijl. 
 - 2d rev. ed. 
 - Oxford,   New York,   Pergamon Press   [1971] 
 - xii, 291 p.   illus.   21 cm. 
<br/><br/>Bibliography: p. 253-272. 
<br/><br/><label>ISBN: </label>0080164218 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Pollination.<br/> Plant ecology.
<br/><br/><label>Dewey Class. No.: </label>581.1/6/62