examinations staff of United States Armed Forces Institute, Ralph W. Tyler, director.
Examination in Electron tubes and circuits, college level. Form CETC-1-B-4.
R559313. Examination in Electron tubes and circuits, college level. Form CETC-1-B-4. By examinations staff of United States Armed Forces Institute, Ralph W. Tyler, director. © 15Apr46; AA60666. Educational Testing Service (PWH); 4Sep73; R559313.
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