Far more info and up to date surveys available in book form in stores.
- http://cncc.org.uk/home.html CNCC - Permits and info
- http://www.sat.dundee.ac.uk/~arb/yorkshire/yorkshire.html Cave locations
- http://cavemaps.org/ Old Surveys
- http://ukcaving.com/board/index.php/topic,6127.0.html Discussion on availability of Yorkshire surveys, and update of Northern Caves (March 2008)
- AquaMole Aquamole
- http://www.braemoor.co.uk/cavingtrip/directory.shtml Aquomole + lesser Gaping entrances rigging guides +etc
- http://www.thedca.org.uk/ DCA - Access Info and News
http://www.swcc.org.uk/caving/access/ SWCC - Access info for OFD
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