00358nam a2200109Ia 4500008004100000082001800041100003300059245002300092260004000115630001800155650007500173211109s9999||||xx |||||||||||||| ||und||  a553.38bTHI-M  aThiruvazhiyodu, Unnikrishnan 0aMaranathinte Niram  bNational Book StallaKottayamc1978  xGENERAL STACK  aNATURAL SCIENCE& MATHEMATICSvEARTH SCIENCExECONOMIC GEOLOGYGeneralia