Durham gravity collector
| Firth Author | Year | Full citation | Keywords |
|---|---|---|---|
| Holmes | 1963 | Holmes R. M. and I. J. Bassett, 1963. Effect of meteorological events on ragweed pollen count. International Journal of Biometeorology 7(1): 27-34 |
Ambrosia spp., pollen counts, Durham gravity collector, Ottawa, Canada |