000 00397nam a2200157Ia 4500
008 180424s9999 xx 000 0 und d
084 _a515.35 O2:1
245 0 _aUnit -17 Second Order Differential Equations
250 _a\\197200ENGGPSX
260 _aOpen University Press
260 _b1972
260 _cLondon
300 _a27p
500 _aincludes index and biblioraphy
942 _cBK
999 _c39165
_d39165