00454nam a2200181Ia 4500 170901s1978 xx 000 0 und d 0134646363 302.34 W59I Wilson, Stephen Informal Groups An Introduction New Jersey Prentice-Hall 1978 305 Social sciences Sociology Informal groups Small groups ddc BK 1413 1413 0 0 ddc 0 0 RAU RAU 2017-10-18 Rajsons, Delhi USD 20.95 0 302.34 W59I 33714 2017-10-18 1982-07-22 BK