000 00339nam a2200145Ia 4500
008 240618s9999||||xx |||||||||||||| ||und||
020 _aNCST
040 _aMAIN
082 _a317
100 _aBOUND VOLUME
_936611
245 0 _aCOMMUNICATIONS OF THE ACM, VOL.30(1-6),1987
250 _a1
260 _bACM
_c1987
_aNEW YORK
942 _cBK
999 _c43480
_d43480