00253nam a22001097a 4500020001800000082001300018100001700031245005100048250000700099260002900106300000800135  a9788171304530  a894.8123  aKESAVADEV. P  aഅയല്‍ക്കാര്‍. AYALKKAR  a21  aKOTTAYAMbDC BOOKSc2022  a294