Wassink, E. C. <br/><br/>
Different bumble bees visiting Digitalis purpurea and its forma Heptandra 

 - Wageningen :  Veenman & Zonen,  1975 
 - 6 p.  : ilus. 
 - Mededeling landbouwhogeschool  ; 75-20 .
 - Mededeling landbouwhogeschool  ; 75-20 .
<br/><br/><label>LCCN: </label>53019 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abejas.<br/>Digitalis purpurea.