Exploring American history / by Mabel B. Casner and Ralph Henry Gabriel, advisory board, J. Russell Smith, William G. Kimmel, [and] R. V. Harmon, maps by George Bell. Casner, Mabel B. Gabriel, Ralph Henry, 1890-1987, joint author. 973 CAZ Map on lining-paper. Includes music. Published also in two volumes. "Readings to consult" at end of each problem except problem 28. New York, Harcourt, Brace and company, 1935. 1935. 1935 Text xix, 828, 26 p. eng United States History.