https://members.lnwrs.org.uk/product/lnwr-pre-grouping-railway-scene-no-3-o-s-nock/
LNWR Pre-grouping Railway Scene No.3 – O.S.Nock | Membership/LNWRS
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https://www.steamindex.com/library/nock.htm
O.S. Nock: author most prolific (revised 2018)
Ossie Nock: railway writer and historian of locomotive performance
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