000 00335pam a2200109a 44500
082 _aTR
_bRM-3651
100 _aL. J. Beecham
245 1 _aSome notes on an approximate solution for the free oscillation characteristics of non-linear systems typified by X+F(X,X)=O
260 _a
_b
_c
700 _aI. M. Titchener
997 _aTR6143 C
999 _c405626
_d405626