TY  - BOOK
AU  - Franssen,J.M.
TI  - Phototropism in seedlings of sunflower, Helianthus Annus L: with a summary in Dutch
PY  - 1980///
CY  - Wageningen
PB  - H. Veenman & Zonen B.V
KW  - Sunflowers
KW  - Seedlings
ER  -