000 00398 a2200157 4500
020 _a9559549405
082 _a553.8
_bARI
090 _c16165
_d24515
100 _aAriyaratna, D.H.
245 _aGems of shri lanka
250 _a5th Revised ed.
260 _aColombo
_bSri Lanka Association for Advancement of science
_c1976
_g1979
300 _a[xiv],110p.
_c21cm
650 _aGems
942 _cPR
999 _c44182
_d44182