000 002660000a22001210004500
008 160502b1948 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a621.384132
_bA7
942 _cBK
100 _aArguimbau, L.B.
245 _aVacuum tube circuits
260 _c1948
999 _c8439
_d8439