000 00238nam a2200097 4500
245 _aTheory of protection
_cby W.M. Corden
100 _aCorden, W.M.
260 _aOxford
_bClarendon
_c1971
300 _axiii,263p.; 22cm.
082 _a382.7
_bCOR
999 _c25660
_d25660