TY - RPRT TI - U.S. Geological Survey 2002 petroleum resource assessment of the National Petroleum Reserve in Alaska (NPRA): play maps and technically recoverable resource estimates AU - Kenneth J. Bird AU - David W. Houseknecht PY - 2002 DO - 10.3133/ofr02207 UR - https://pubs.usgs.gov/publication/ofr02207 ID - ofr02207 ER -