1. Adventure Cycling in Europe: A Practical Guide to Low-cost Bicycle Touring in 27 Countries. John Radowski. 1981. Rodale Press.
  2. Bike Touring: The Sierra Club Guide to Outings on Wheels. Raymond Bridge. 1979.
  3. Bicycle Touring In Europe. Karen & Gary Hawkins. 1980. Pantheon Books, NY
  4. Ireland by Bike: 21 Tours geared for discovery. Robin Krause. 1999. The Mountaineers, WA.
  5. Cycle Touring Ireland. Brendan Walsh. Gill & Macmillan. 1992.

Other resources
US Climate
World Climate