000 00259nam a2200097Ia 4500
008 240404s9999 xx 000 0 und d
100 _aAbian, Alexander
245 0 _aBoolean rings
_cAlexander Abian
260 _aBoston
_bBranden Press
_c1976
942 _aIMAR
_cCART
999 _c35909
_d35909