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2. Methods of palynological preparation for palaeoenvironmental, source potential and organic maturation studies;Batten;Norwegian Petroleum Directorate-Bulletin,1983
3. Calculation of pollen and spores density in sediments by addition of exotic pollen in known quantities;Benninghoff;Pollen et Spores,1962
4. Dinoflagellate cysts from the Buda Limestone (Cenomanian), Cerro de Cristo Rey, Dona Ana County, New Mexico;Cornell;Review of Palaeobotany and Palynology,1997
5. A method for determination of absolute pollen frequency;Davis,1965