000 00299nam a2200121Ia 4500
008 221001s1968 xx 000 0 eng d
082 _a515.35 ESS
100 _aEsser, Martinus
245 0 _aDifferential equations
260 _aLondon
_bW. B. Saunders
_c1968
300 _aix, 249p.
942 _2ddc
_cBK
999 _c2053
_d2053