TY  - BOOK
AU  - Harder,L.
TI  - Functional differenes of the proboscides of short and long-tongued bees (Hymenoptera, Apoidea)
UR  - https://drive.google.com/file/d/1ltI-g5OU_9jJnIYQJOJ3WXk0h6_3rVxS/view?usp=drivesdk
ER  -