00395    a2200133   4500082001600000100002300016245003800039260007400077300001800151440003600169650001400205650002000219650002200239  a552.58bABE  aAbeysinghe, P. B.   aLimestone resources of sri Lanka   aColombobNatural Resources, Energy &  Sciences Authority of Sri Lanka  aii,59p.c21cm  aScience education series No. 23  aPetrology  aCarbonate rocks  aSedimentary rocks