Franssen, J.M. <br/><br/>
Phototropism in seedlings of sunflower, Helianthus Annus L.  with a summary in Dutch 
J.M.Franssen 
 - Wageningen:  H. Veenman & Zonen B.V,  1980. 
 - 83 pages;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sunflowers<br/>Seedlings