Costin, Lela B. Child welfare : policies and practice / Lela B. Costin. - 2d ed. - New York : McGraw-Hill, c1979. - ix, 469 p. : ill. ; 24 cm. ISBN: 0070132062 LCCN: 78015006 LC Class. No.: HV713 .C67 1979 / .C67 1979 Dewey Class. No.: 362.7/0973