Bertcher, H. J. (1979). Group participation techniques for leaders and members. Published in cooperation with the Continuing Education Program in the Human Services of the University of Michigan School of Social Work [by] Sage Publications.

Bertcher, Harvey J. Group Participation Techniques for Leaders and Members. Beverly Hills, Calif.: Published in cooperation with the Continuing Education Program in the Human Services of the University of Michigan School of Social Work [by] Sage Publications, 1979.

Bertcher, Harvey J. Group Participation Techniques for Leaders and Members. Published in cooperation with the Continuing Education Program in the Human Services of the University of Michigan School of Social Work [by] Sage Publications, 1979.