Spekke, Arnolds, 1887-1972. The Baltic Sea in ancient maps / By Arnolds Spekke. - Stockholm : M. Goppers, 1961. - ix, 75, [1] p. : illus., group port., maps (part fold.) ; 31 cm. Bibliography: p. 75-[76] Subjects--Topical Terms: Cartography--Baltic Sea. Dewey Class. No.: 914.74 / SPB 1961