000 00293pam a2200109a 44500
082 _a517.38
_bP57E2
100 _aPiaggio, H.T.H.
245 1 _aAN ELEMENTARY TREATISE ON DIFFERENTIAL EQUATIONS AND THEIR APPLICATIONS
260 _a
_bOrient Longmans
_c1969
964 _gCIRC
997 _a8122 C
999 _c412677
_d412677