TY - RPRT TI - Digital map data, text, and graphical images in support of the 1995 National assessment of United States oil and gas resources AU - William R. Beeman AU - Raymond C. Obuch AU - James D. Brewton PY - 1996 DO - 10.3133/ds35 UR - https://pubs.usgs.gov/publication/ds35 ID - ds35 ER -