000			00331nam a2200145Ia 4500
008			230524s9999 xx 000 0 und d
040			_cUDSM
050			_aB29.B54
100			_aBlack, M.
245		0	_aModels and metaphors
260			_c1962
300			_c22cm.
942			_2Library of Congress Classification
942			_cBook
999			_c81983 _d81983