FAEGRI, K. <br/><br/>
The principles of pollination ecology. 

 - 3rd edi. 
 - Oxford.  Pergamon Press.  1980 
 - xi, 244p. 
<br/><br/><label>ISBN: </label>0 08 021338 3 
<br/><br/><label>Dewey Class. No.: </label>581.1'1'6'62