TY - RPRT TI - Extract ability of humic acid from coalified logs as a guide to temperatures in colorado plateau sediments AU - Irving A. Breger AU - J.C. Chandler PY - 1960 DO - 10.2113/gsecongeo.55.5.1039 UR - https://pubs.usgs.gov/publication/70220522 ID - 70220522 ER -