LDR 00417nam a2200121zu 4500 008 090205n chi d 100 1 _aSteever, Sanford B. 245 _aThe Evolution of the Present Perfect in Pengo _cSteever, Sanford B. 773 0 _tJournal of the American Oriental Society _gVol. 104.4 (1984); p. 621-648" 946 _a 001 IFS35453 999 _c307075 _d307075 952 _70 _c1 _40 _00 _9171741 _yBOOK _10 _d2009-05-14 _aIFS