Davis, Harold T. 1892-1974. Political statistics. [electronic resource] / With an introd. by Kenneth W. Colegrove.. — Evanston, : Principia Press of Illinois,, [c1954]. — 364 p. : illus. 22 cm. LCCN: 55033427 Subjects--Topical Terms: Political statistics. LC Class. No.: JA74 / .D3 1954 Dewey Class. No.: 320