BASIC TELEPHONY

Year Published: 1956

Format: 16mm/video file

Description: Department of DefensePIN 28372BASIC TELEPHONY1961ELECTRO-MAGNETIC THEORY AS APPLIED TO TELEPHONY; COMPONENTS, OPERATION AND TRANSMISSION RANGE OF SOUND POWERED, LOCAL BATTERY, AND COMMON BATTERY TELEPHONIC SYSTEM..

Complete Record: Department of Defense PIN 28372 BASIC TELEPHONY 1961 ELECTRO-MAGNETIC THEORY AS APPLIED TO TELEPHONY; COMPONENTS, OPERATION AND TRANSMISSION RANGE OF SOUND POWERED, LOCAL BATTERY, AND COMMON BATTERY TELEPHONIC SYSTEM..

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