ITT Kolster Brandes Model KR611 Transistor Radio Service Manual

ITT Model RC500 Service Manual Radio Cassette Recorder

Bush Model BR8428AA Audio Service Information-Radio Cassette (transistor)

Cossor Model 546 Transistor Radio Service Manual

ITT Model RC500 Radio Cassette Recorder Service Manual

Cossor CR7225T Portable Transistor Radio Service Information

ITT KB Model SL51 Automatic Cassette Player Service Manual

Reference Data for Radio Engineers 4th Edition 1956 ITT Vintage Technical Manual