UNITED STATES ARMED FORCES INSTITUTE, MADISON, WIS.
Examination in Electron tubes and circuits. College level, form CETC-l-A-4. By examinations staff, Ralph W. Tyler, director.
UNITED STATES ARMED FORCES INSTITUTE, MADISON, WIS. Examination in Electron tubes and circuits. College level, form CETC-l-A-4. By examinations staff, Ralph W. Tyler, director. © 27Mar45; AA19554. Educational Testing Service (PWH); 13Oct72; R537041.
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