Determination of the Specific Gravity of Ragweed Pollen (Ambrosia elatior) and Conversion of Gravity Sample Counts to Volumetric Incidence
- 1 January 1949
- journal article
- Published by JSTOR in Public Health Reports (1896-1970)
- Vol. 64 (38), 1195
- https://doi.org/10.2307/4587094