TY  - BOOK
AU  - Hurd,P.D.
TI  - Observations on the nesting habits of some new world carpenter bees with remarks on their importance in the problem of species formation (hymenoptera: Apoidea)
UR  - https://drive.google.com/file/d/1cgdJpPVPQVG-_qOdrOXouQg8gzU72WjL/view?usp=drivesdk
ER  -