Grüger, Johanna (1973): Studies on the Late Quaternary vegetation history of northeastern Kansas. Geological Society of America Bulletin, 84(1), 239-250, doi:10.1130/0016-7606(1973)84<239:SOTLQV>2.0.CO;2
Grüger, Eberhard (1973): Pollen examinations from Muscotah Marsh (Core B), Kansas, U.S.A. North American Pollen Database, National Oceanic and Atmospheric Administration (NOAA), ftp://ftp.ncdc.noaa.gov/pub/data/paleo/pollen/asciifiles/fossil/ascfiles/gpd/muscotab.txt