TY - RPRT TI - Early Triassic (Smithian) ammonites of paleoequatorial affinity from the Chulitna terrane, south-central Alaska AU - K. M. Nichols AU - Norman J. Silberling PY - 1979 DO - 10.3133/pp1121b UR - https://pubs.usgs.gov/publication/pp1121B ID - pp1121B ER -