found: Work cat.: 85002258: All-terrain bikes, 1985.
found: Wikipedia, Dec. 17, 2007(Mountain biking. Mountain biking entails the sport of riding bicycles off-road, often over rough terrain, whether riding specially equipped mountain bikes or hybrid road bikes. Mountain biking is roughly broken down into four categories: cross country, downhill, freeride, and trials/street riding. Each has differing levels of safety-consciousness with different types of mountain bikes and riding gear.)
found: Official website of the Olympic Movement, Dec. 17, 2007:sports/cycling (Cycling at the Olympics features four exciting disciplines: road, track, mountain biking, and BMX [bicycle moto cross])
found: Official website of USA Cycling, Dec. 17, 2007:mountain homepage (mountain biking)
found: Google search, Dec. 17, 2007(14,900 hits for "all terrain cycling"; 840 for "all terrain bicycling"; 4,570 for "all terrain biking"; 11,200,000 for "mountain biking"; 52,400 for "mountain bicycling"; 36,000 for "mountain cycling"; 78,900 for "off-road cycling"; 60,600 for "off-road biking"; 17,000 for "off-road bicycling")
found: OCLC search, Dec. 17, 2007(11 records retrieved on title keyword search for all terrain cycling, all terrain biking, or all terrain bicycling; 786 records retrieved on title keyword search for mountain cycling, mountain biking, or mountain bicycling)
found: LC database, Dec. 17, 2007(1 record with "all terrain biking" in title; 1 record with "all-terrain bicycling" in title; 239 records with "mountain biking" in title; 2 records with "mountain bicycling" in title; 0 records with "all terrain cycling" or "mountain cycling" in title; 1 record with "off-road biking" in title; 2 records with "off-road bicycling" in title; 1 record with "off road cycling" in title)