000 00230pam a2200121a 44500
082 _a541.39
_bC83V2
100 _aCoulson,C.A.
245 1 _aVALENCE
250 _a2
260 _a
_b
_c1961
964 _gCIRC
997 _a50833 C
999 _c412042
_d412042