AU  - Willemse,M.T.M..
TI  - Sexual Reproduction in Seed Plants, Ferns and Mosses / 
SN  - 90 220 0879 7
U1  - 581.041 
PY  - 1985///
CY  - Netherlands-
PB  - Pudoc Wageningen , 
KW  - Botany
N1  - NULL
ER  -