Many thanks to SWLing Post contributor, Kris Partridge, who shares the following:

I belong to a FaceBook group “The Broadcasting Club” and [recently] there was posted a link to a YouTube video of a 70 year old 1951 US Army film called “The Independent Radio Station WMCA”. It’s worth a view to show what the thinking was 70 years ago:

From YouTube:

In 1951 the US Army made this film showing how an independent radio station operates. There was certainly a cold war propaganda motive for the US Army to produce this film, but today, when independent stations are a rarity, this film gives a detailed view of how a large market, independent radio station, WMCA New York, went about producing its programming and paying the bills in post war America.

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Thank you so much for sharing this, Kris!