TY  - BOOK
AU  - Faegri K
AU  -  Pijl L V
TI  - Principles of pollination ecology
T2  - Pergamon international library of science technology, engine ring & social studies
U1  - I,166:5, L1;L9 
PY  - 1979///
CY  - Oxford
PB  - Pergamon Press        
KW  -  Pollen
KW  - Botany
ER  -