000 00257nam a22000977a 4500
082 _a320
_bBIR.K
100 _aBirch, A H
245 _aKey concept in political science :
_brepresentation /
_cby A H Birch
260 _aLondon :
_bMacmillan,
_c1971.
942 _cBK
999 _c487378
_d487378