Severin Timothy Explorers of the Mississippi - London Routledge and Kegan Paul U K 1967 - x,274p. P.18,19,34,35,194,195,210,211,. cm. Bibliography p. 261-65; Index:P267-74 Source: General Book Subjects--Topical Terms: Travels Dewey Class. No.: U8.73.6M.N6, K7