USGS1996Maps showing the resource assessment of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska Peninsula with a section on geology of the Pyramid porphyry copper deposit, Alaska Peninsula, AlaskaNo abstract available.Alaska↗
USGS1989Preliminary geologic and rock-chip geochemical data from drill core and trenches at the Shumagin gold deposit, Unga Island, AlaskaNo abstract available.Alaska↗