Sperlich, Peter W. Conflict and harmony in human affairs : a study of cross-pressure s and political behaviour / [by] Peter W. Sperlich. - Chicago : Rand McMally , [1971]. - xii, 256 p. : ill. ; 24 cm. - American politics research series. . Bibliography : (p. 224-241). Subjects--Topical Terms: Political sociology. Dewey Class. No.: 301.63 SPE