TY - RPRT TI - Surficial geologic map of the northwestern quarter of the Tyonek A-4 Quadrangle, south-central Alaska AU - H. R. Schmoll AU - L. A. Yehle PY - 1987 DO - 10.3133/mf1934 UR - https://pubs.usgs.gov/publication/mf1934 ID - mf1934 ER -