000 00307pam a2200121a 44500
010 _a65014580
082 _a531.32
_bB973E
100 _aButenin, N.V.
245 1 _aELEMENTS OF THE THEORY OF NONLINEAR OSCILLATIONS
260 _a
_bBlaisdell Publishing Company
_c1965
964 _gCIRC
997 _a59461 C
999 _c408861
_d408861