found: World Book:v. 19, p. 176, under Recreational vehicles (Truck campers slide into the cargo area of a pickup truck. They range from 7 to 15 feet long and are attached to the truck by bolts, clamps, and other fasteners.)
found: The Journal, Fri. Aug. 16, 1991:p. C3 ("Truck campers, which fit into the bed of a pickup or are mounted on a pickup chassis ...")
found: Esdale, G. Recreational vehicles("Truck campers are portable units that are either temporarily carried (slide-ins) or permanently attached (chassis-mounts) on a half-ton or larger truck.")
