TY  - RPRT
TI  - Ragweed pollen challenges in a controlled environment.
AU  - V J Fontana
AU  - L Indyk
AU  - M Zanjanian
PY  - 1974
DO  - 10.1016/0091-6749(74)90066-9
UR  - https://pubmed.ncbi.nlm.nih.gov/4415465/
ID  - 4415465
ER  -