Television audience research at Britain's independent broadcasting authority, 1974–1984 - Wober, J. Mallory and Gunter, Barrie (Journal of Broadcasting & Electronic Media, 1986)
https://katalog.adlr.link/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA4MC8wODgzODE1ODYwOTM4NjYwNQ