000 00269nam a22001217a 4500
040 _cSY
082 _a574
100 _aកែវ គឹមហុង
245 _aEcology, អេកូឡូស៊ី
260 _aRUA
_bកែវ
_c2008
300 _a20p.
942 _cMA
999 _c10074
_d10074