TY  - BOOK
AU  - Parker,F.D.
TI  - Nests of Callanthidium from Block Traps (Hymenoptera: Megachilidae)
UR  - https://drive.google.com/file/d/1TZfNCx063EFgI8ovhd4Svufdwr5pQHep/view?usp=drivesdk
ER  -