Wood Resources: UK

http://www.scotland.gov.uk/Publications/2002/03/15098/8866

http://www.trada.co.uk/

http://siding.builddirect.com/Cedar-Siding/cedarsiding-Tongue-and-Groove/ProductDisplay_9647_P1_10018678.aspx
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http://www.redwoodlumberco.com/siding.html

http://www.dtimber.co.uk/cladding.html