TY  - BOOK
AU  - Faegri K
AU  -  Van der Pijl L V
TI  - Principles of pollination ecology
U1  - I,166:5, L1;2 
PY  - 1971///
CY  - Oxford
PB  - Pergamon Press        
KW  -  Pollen
KW  - Botany
ER  -