Richard D. (1979). The Manis Mastodon Site: Early Man on the Olympic Peninsula, Canadian Journal of Archaeology, 3:157–164. Archaeological sites on the National Register of Historic Places in Washington (state) Clallam County, Washington Mastodons Native American history of Washington (state) Natural history of Washington (state) Pleistocene Pre-Clovis archaeological sites in the Americas National Register of Historic Places in Clallam County, Washington