WILLIAMS, Margaret, Introduction to social work research / Margaret Williams, Yvonne A. Unrau and Richard M. Grinnell, Jr. - Itasca, Ilinois F.E. Peacock Publishers, c1998. - ix, 402 p. : ill. ; Includes reference and index ISBN: 0875814158 Subjects--Topical Terms: Social work research Dewey Class. No.: 361.07