000			00342nam a2200157Ia 4500
008			190201s9999 xx 000 0 und d
020			_a120852500
082			_a512
082			_b4 BEH
100			_a"Behrens, Ernst August"
245		0	_aRing Theory
260			_aNew York
260			_bAcademic Press.
260			_c1972
300			_a320
999			_c27436 _d27436