000 00315nam a2200133Ia 4500
008 210212s9999||||xx |||||||||||||| ||und||
072 _aMath
082 _a512.9044 Hal N
_21990
100 _aHall H S
245 0 _aHigher Alagbera
260 _c1990
_bA.K Publications Agra
_aAgra
300 _a576 P
942 _cSU
999 _c88093
_d88093