Wheelan Susan A. Handbook of group research and practice - Thousand Oaks Sage Publications 2005 - 589p. cm. ISBN: 0761929584 5552.5 Standard No.: 86241 Source: 83305, 05/09/2007, International Book Distributors Reference Collections Subjects--Topical Terms: PSYCHOLOGY Dewey Class. No.: S8:fg, P5(RR)