000 00265nam a2200121Ia 4500
008 180611s9999||||xx |||||||||||||| ||und||
020 _a0-07-072197-1
041 _aen
082 _a51535
100 _aC. RAY WHYLIE
245 0 _aDIFFER ENTIA L EQUATIONS
942 _cLL
999 _c462
_d462