Davis, Margaret B.2016-03-122016-03-121966Davis, Margaret B. "Determination of Absolute Pollen Frequency." Ecology 47.2 (1966): 310-1.https://hdl.handle.net/11299/178243Changes in technique have simplified and made more reliable a method for determining the absolute numbers of pollen grains in sediment samples. The prepared sample is suspended in its entirety in the volume of fluid from which measured portions are taken for counting; tertiary butyl alcohol, instead of benzene with dissolved silicone fluid, is used as the suspending fluid.enArticle