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26 maggio 2006 | 
Autore ISSA Workshop 26-28 May 2006, Yorkshire
A field weekend with the International Society for Speleological Art Â
 ISSA has planned a weekend in the Dales to coincide with the Bradford Pothole Club’s Gaping Gill winch meet. For further information please contact Ceris Jones
http://issa.org.uk/
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