Publication Details (including relevant citation information): Cahill, R. A. and A. D. Autrey. 1988. Total and inorganic carbon content of 18 National Bureau Standards Standard Reference Materials and 4 Canadian Certified Reference Standards. Geostandards Newsletter, Vol. 12, p. 39-42 Gilkeson, R. H., R. A. Cahill, and C. R. Gendron, 1988, Natural background radiation in the proposed Illinois SSC area, Illinois State Geological Survey Environmental Geology Notes 127, 47 p. Gendron, C. R., R. A. Cahill, and R. H. Gilkeson. 1988. Comparison of spectral gamma ray (SGR) well logging with instrumental neutron activation analysis (INAA) data for rock types in northern Illinois. The Log Analyst, Society of Professional Well Log Analysts, Vol. 29, No. 5, p. 345-357.