Blythe, Betty J. Direct practice research in human service agencies Betty Blythe, Tony Tripodi, Scott Briar. - New York Columbia University Press c1994. - 231 p. ill. 24 cm. Includes bibliographical references (p. [223]-226) and index. ISBN: 0231073666 (cloth : acid-free paper) 0231073674 (paper : acid-free paper) LCCN: 94024325 Subjects--Topical Terms: Human services--Research--United States.Social service--Research--United States. LC Class. No.: HV11 / .B594 1994 Dewey Class. No.: 361.3/2