TY  - BOOK
AU  - Skvarla,John J.
AU  - Larson,Donald A.
TI  - An electron microscopic study of pollen morphology in the compositae with special reference to the ambrosiinae
UR  - https://drive.google.com/file/d/1dACcHcCbTHhTeRILoOOYp5c9IyzZxeZC/view?usp=drivesdk
ER  -