[49] British Interactive Group，op.cit.
[50] M.Hanna，Sightseeing in the UK，London：BTA/ETB Research Services，annual series.
[51] These are：the ARC，Armagh Planetarium，Catalyst，Eureka！，Bristol Exploratory，Explore It （Northern Ireland），Green’s Mill and Science Centre，Satrosphere，Jodrell Bank Science Centre，Newcastle Discovery，Sellafield Visitor Centre，Snibston Discovery Park and Techniquest.
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