Radio books, 'Radio Days Australian Bakelite Radios' by Sheridan and Singer, 'The Best Years of Australian Radio' by Rod Smith, 'Zenith Transistor Radios' by Norman Smith, 'Transistor Radios 1954 - 1968 by Norman Smith and 'Genuine Plastic Radios of the Mid-Century with Values' by Jupp and Pina.