TY - RPRT TI - Areas of historical oil and gas exploration and production in the conterminous United States AU - Richard F. Mast AU - D. H. Root AU - L. P. Williams AU - W. R. Beeman PY - 1995 DO - 10.3133/ofr9575c UR - https://pubs.usgs.gov/publication/ofr9575C ID - ofr9575C ER -