000 00378nam a2200157 4500
008 160616s2008 000 0
245 _aFirst Steps in Modal Logic
100 _aPopkorn, Sally
260 _aNew York
260 _bCambridge University Press
260 _c2008
300 _a314
020 _a9780521057936
942 _cBK
_2BK25032
_01
080 _a510.6 POP
999 _c25032
_d25032