00369nam a2200121Ia 4500008004100000082001500041100001700056245002000073260005900093300001000152630001800162650006700180211109s9999||||xx |||||||||||||| ||und||  a510bKOC-P  aKochumman, C 0aPragathakalanam  bState Institute of LanguagesaThiruvananthapuramc1974  a468p.  xgeneral stack  asciencevnatural science and mathematicsxmathematicsGeneralia