TY - RPRT TI - In situ bulk density estimates from borehole gravity data in limestones of the Madison Group, test well No. 2, Custer County, Montana AU - Bruce A. Kososki AU - Stephen L. Robbins PY - 1980 DO - 10.3133/ofr80982 UR - https://pubs.usgs.gov/publication/ofr80982 ID - ofr80982 ER -