The Alaska Mineral Resource Assessment Program: Background Information to Accompany Folio of Geologic and Mineral Resource Maps of the Circle Quadrangle, Alaska, Issues 985-990
Helen Laura Foster · Isaac Judah Winograd · Mark R. Lewis · Michael H. Bothner · Otto W. Nuttli · F. P. Haeni · G. A. Bollinger · Robert B. Herrmann
Jan 1984 · U.S. Geological Survey