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These were magazine tests conducted in 1976 and 1977, primarily in Germany and Great Britain. I doubt they are on the internet in any digital format, so you're going to have to find them for yourself. The easiest way is to buy one of the various compilations of magazine articles from the period.
Most magazines don't offer a full disclosure of their methods, so at best you're limited to ambient conditions and maybe a weight, as tested.
JR
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