found: Random House(Dirt bikes see Trail bikes)
found: LC database, Nov. 3, 1988(Dirt bikes; Trail bikes)
found: Web. 9th new coll. dict.(Dirt bike; Trail bike)
found: OCLC, June 5, 2003(trail bikes; dirt bikes; off-road bikes; trail-cycles; off-road motorcycle)
found: Minnesota. Dept. of Natural Resources. Moose River ATV/OHM Trail, c2001:map verso (OHMs - Motorized, Off-highway Motorcycles are vehicles traveling on two wheels that have a seat or saddle designed to be straddled by the operator and have handlebars for steering control. Motorcycles may be legal for highway use and still considered to be OHMs if used for off-highway operation on trails or natural terrain)
notfound: ASTI;Engr. index;TEST;Web. 3
