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This was last updated Jan 2018.
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Campo 57 Gruppignano
New Zealand sites such as http://nzetc.victoria.ac.nz/tm/scholarly/WH2-1Epi-fig-WH2-1Epi-i013a.html
Silver John Target Tank
A variety of books including Trumble, Brough, Beecroft, and Barnett, Fenton all of which are listed in the recommended readings.
and a number of private resources.