共 8 条
[2]
An improved d.c. amplifying circuit
[J].
REVIEW OF SCIENTIFIC INSTRUMENTS,
1933, 4 (10)
:532-536
[5]
RHODES TJ, 1941, IND INSTRUMENTS MEAS
[8]
The mass spectrometer as an analytical tool
[J].
INDUSTRIAL AND ENGINEERING CHEMISTRY-ANALYTICAL EDITION,
1943, 15
:541-547