TY  - BOOK
AU  - Willemstein, S.C.
TI  - An evolutionary basis for pollination ecology
T2  - Leiden Botanical series
SN  - 90-04-08457-6.
AV  - QL468.7.W55 
CY  - Leiden
KW  -  Botany--Ecology
KW  -  Insects--Ecology
KW  -  Insects--Food
KW  -  Plants--Evolution
KW  -  Pollination
KW  - Insects--Evolution
KW  - Zoology
ER  -