000 00540 a2200253 4500
001 11257
020 _a3
041 _aeng
080 _a537.228 Hei
245 _aQuartz crystals for electrical circuits : their design and manufacture
250 _a
260 _aNew York
260 _bD. Van Nostrand,
260 _c1946
300 _avii,563 p.
300 _c23 cm
490 _a
100 _aHeising, Raymond A.
700 _a
650 _a
650 _aQuartz crystals-Electric properties
942 _cBK
942 _2UDC
999 _c13130
_d13130