This website includes information previously published in guidebooks, magazines and on other websites:
- "Yorkshire Gritstone Bouldering", by Alan Cameron-Duff, published by ROCKFAX. Information from this book is included here with the permission of ROCKFAX. ROCKFAX reserves its copyright.
- "Yorkshire Gritstone", edited by Dave Musgrove for the Yorkshire Mountaineering Club.
- Tony Barley's and Nigel Baker's "Wild Bouldering in Yorkshire", and Tony's unpublished guides for Guisecliff's Nought Bank boulders and Park Crag.
- Mark Radtke's topos for Swastika Stones (published on the Leeds Wall website) and Lord's Seat (published in On The Edge magazine, issue 96).
- Derek Hargreaves' topos for Gorple Stones and Widdop Clattering Stones, published on the Leeds Wall website.
- Information collected by JP Hotham and published on his website, "Yorkshire Bouldering".
- Richard Seabrook's original High Crag topo, published on the Leeds Wall website.
- The new problems database on the UK Bouldering website.
