000 00236 a2200097 4500
082 _a621.38
_bUn22
245 1 _aPROCEEDINGS OF THE NATIONAL CONFERENCE ON TUBE TECHNIQUES
260 _a
_b
_c1961
964 _gCIRC
997 _a8821 v. 5 s C
999 _c451863
_d451863