TY  - BOOK
AU  - Zimmermann,Michael
AU  - Pleasants,John M.
TI  - Competition among pollinators: quatification of available resources
UR  - https://drive.google.com/file/d/1zwnjMwYz6UKNVJ0uDOCoSbalnlGYPlfy/view?usp=drive_link
ER  -