Environmental changes in the Tule Lake basin, Siskiyou and Modoc Counties, California, from 3 to 2 million years before present / D.P.Adam,J.P.Bradbury,H.J.Roeck,A.M.Sarna-Wojcicki, 1990. - 13 p. - Текст : непосредственный.
Adam D.P. Palynology of two upper quaternary cores from Clear Lake,Lake County,California / D.P.Adam, 1988. - V,86 p. p. - Текст : непосредственный.