TY  - RPRT
TI  - Qualitative and quantitative variations in dwarf ragweed pollens.
AU  - A R Goldfarb
AU  - M Kaplan
PY  - 1967
DO  - 10.1016/0021-8707(67)90086-x
UR  - https://pubmed.ncbi.nlm.nih.gov/4964047/
ID  - 4964047
ER  -