000 002900000a22001210004500
008 160826b1974 xxu||||| |||| 00| 0 eng d
041 _aeng
942 _cBK
100 _aBravery, R.A.
100 _aGilbert, A.P.
245 _aPrinciples and calculations for radio mechanics
260 _c1974
999 _c7761
_d7761