BBC Engineering Monographs from 1950s and ’60s: Once 5 Shillings, Now Free http://www.boingboing.net/2010/12/29/bbc-engineering-mono.html
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BBC Engineering Monographs from 1950s and ’60s: Once 5 Shillings, Now Free http://www.boingboing.net/2010/12/29/bbc-engineering-mono.html