VARADY, David P. Ethnic minorities in urban areas : a case study of racially changing communities / David P. Varady. - Boston : M. Nijhoff ; c1979. - xiv, 187 p. : ill. ; Include Bibliography and index. ISBN: 0898380138 Subjects--Topical Terms: Residential mobility--Pennsylvania--Philadelphia Dewey Class. No.: 301.4510420974811