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General Information

  • Title: Megagroups in Illinois
  • Author(s): Swann, D.H., and Willman, H.B.
  • Publishing Organization: American Association of Petroleum Geologists
  • Series and Number: Bulletin v. 45, no. 4 [p. 471-483]
  • Publication Date: 1961
  • Cross Section: Yes
  • North Latitude: 42° 30' 30" N (42.5083)
  • South Latitude: 36° 58' 13" N (36.9703)
  • East Longitude: 87° 29' 47" W (-87.4964)
  • West Longitude: 91° 30' 47" W (-91.5131)
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