Fellows, L.D., 1994, Carbon dioxide and (or) helium discovery near St. Johns?: Arizona Geology [Arizona Geological Survey], v. 24, no. 3, p. 1. Authors Fellows, L.D. Publication Date 1994 Citation Arizona Geology [Arizona Geological Survey], v. 24, no. 3, p. 1. State AZ Province CP County AP Placenames Puerco River area Keywords Carbon Dioxide Helium Nitrogen More Keywords Carbon Dioxide, Helium, Nitrogen, AzGeoBib RefNum 13253