Whipple, Gertrude. Using our earth / Gertrude Whipple and Person E. James ; Cartography by Arthur H. Robinson. - Rev. ed. - New York : Macmillan, c1947. - vii, 296 p. : ill. ; 22 cm. Including index. 311 311 Subjects--Topical Terms: Traveling Dewey Class. No.: 910 / W577u