000 00264nam a22001217a 4500
040 _cSY
082 _a333
100 _aCHHAY KONGKEA; ឆាយ​ គង្គា
245 _aEnvironmental economics
260 _aRUA
_bCHH
_c2002
300 _a509p.
942 _cEK
999 _c9518
_d9518