@book{33722,
	author = {Bertcher, Harvey J. and University of Michigan.},
	title = {Group participation techniques for leaders and members /},
	publisher = {Published in cooperation with the Continuing Education Program in the Human Services of the University of Michigan School of Social Work [by] Sage Publications,},
	year = {c1979.},
	series = {Sage human services guides ;},
	address = {Beverly Hills, Calif. :}
}