"Direct support and general support maintenance manual for central, message switching, automatic, AN/TYC-39(V)1, (NSN 5805-01-123-1851), AN/TYC-39(V)5, (NSN 5805-01-152-3068), (wire run lists)"@en . . . . . . "Central, message switching, automatic, AN/TYC-39(V)1, (NSN 5805-01-123-1851), AN/TYC-39(V)5, (NSN 5805-01-152-3068), (wire run lists)"@en . . . . . "Handbooks and manuals"@en . . . . . . "United States" . .