000			00377nam a2200145Ia 4500
008			191206s9999 xx 000 0 und d
020			_a60408634
090			_aLC6519B6
245		0	_aDiscussion and group methods: theory and practice
250			_a2d ed.
260			_aHarper & Row
260			_cc[1975]
300			_a"xiv, 395 p. 24 cm."
999			_c15835 _d15835