00287nam a2200121Ia 4500008004100000082001100041082001000052100002800062245003000090260001400120260002200134260000900156230118s9999||||xx |||||||||||||| ||und||  a516.24  bPIL/A  ac.p.janardhananbpillay 0aabc series in mathematics  aottapalam  bajith book centre  c1991