1. A supplementary expedition into the Copper River Valley, 1884;Abercrombie,1900
2. The thin edge: evidence for precontact use and working of metal on the Northwest Coast;Acheson,2003
3. The North Coast Prehistory Project Excavations in Prince Rupert Harbour, British Columbia: the Artifacts;Ames,2005
4. Peoples of the Northwest Coast: Their Archaeology and Prehistory;Ames,1999
5. Badone, E., 1980. Letter to Dr. William Workman (Alaska Methodist University) from Department of Metallurgy and Materials Science, University of Toronto.