000 00301pam a2200109a 44500
082 _a517.38
_bP57E2 COP.6
100 _aPiaggio, H.T.H.
245 1 _aAN ELEMENTARY TREATISE ON DIFFERENTIAL EQUATIONS AND THEIR APPLICATIONS
260 _a
_bG. Bell And Sons
_c1960
964 _gCIRC
997 _a23774 C
999 _c412674
_d412674