TY - RPRT TI - Stratigraphy and chemical analyses of coal beds in the Upper Cretaceous and Tertiary Sagavanirktok Formation, east-central North Slope, Alaska AU - Stephen B. Roberts AU - Gary D. Stricker AU - Ronald H. Affolter PY - 1991 DO - 10.3133/coal139b UR - https://pubs.usgs.gov/publication/coal139B ID - coal139B ER -