RT Journal Article SR Electronic T1 On the oil-bearing limestone of Chicago JF American Journal of Science JO Am J Sci FD American Journal of Science SP 420 OP 425 DO 10.2475/ajs.s3-1.6.420 VO s3-1 IS 6 A1 Thomas Sterry Hunt YR 1871 UL http://www.ajsonline.org/content/s3-1/6/420.abstract AB