000 00297nam a2200121Ia 4500
008 210901s1972 xx 000 0 eng d
082 _a517.2 OPE
100 _aOpen university
245 0 _aDifferential equations II
260 _bOpen university press
_c1972
300 _a50p.
942 _2ddc
_cBK
999 _c10411
_d10411