000 00313nam a22001217a 4500
040 _cUDSM
050 _aBS101.H75
100 1 _aHughes, G E
_eAuthor
245 1 4 _aThe elements of formal logic
260 _aLONDON.
_b : Billing and son ltd.
_c1965.
300 _axii,398p.
_b : ill.
_c ; 22cm
942 _2lcc
_cBK
_n0
999 _c144515
_d144515