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APA Citation Edition CitationMidwest Friends of the Pleistocene: annual field conference & Johnson, W. H. (1972). Pleistocene stratigraphy of east-central Illinois: Midwest Friends of the Pleistocene 21st Annual Field Conference, May 12-14, 1972. Illinois State Geological Survey.
Chicago Citation Edition CitationMidwest Friends of the Pleistocene: annual field conference und W. Hilton Johnson. Pleistocene Stratigraphy of East-central Illinois: Midwest Friends of the Pleistocene 21st Annual Field Conference, May 12-14, 1972. Urbana-IL: Illinois State Geological Survey, 1972.
MLA Citation Edition CitationMidwest Friends of the Pleistocene: annual field conference und W. Hilton Johnson. Pleistocene Stratigraphy of East-central Illinois: Midwest Friends of the Pleistocene 21st Annual Field Conference, May 12-14, 1972. Illinois State Geological Survey, 1972.
