Glacial map of North America

Sections of map separately titled: (Part 1) Western half.--(Part 1) Eastern half; Relief and depths shown by contours; "Lambert conformal conic projection."; "Base prepared by the Bureau of Geology and Topography, Mines and Geology Branch, Department of Mines and Resources, Ottawa, largely under a grant from the American Geographical Society of New York."; Includes index to "Footnotes."; Insets: Principal loess distribution in central United States.--Index map.--Glacial map of the north polar hemisphere; Accompanied by: Glacial map of North America : part 2, bibliography and explanatory notes / by Richard Foster Flint, 1945. (37 p. ; 25 cm.); Includes bibliographical references;