000			00337nam a2200145Ia 4500
008			220926s9999 xx 000 0 und d
100			_aAlan Simpson
245		0	_aUnderstanding D. Base IV
250			_a1st Ed
260			_aU.S.A
260			_bBPB Publications
260			_c1989
650			_aUnderstanding D. Base IV
942			_cBK
999			_c13436 _d13436