Federal supply schedule, FSC groups. 26. Tires and tubes pt. 3, (formerly class 8, pt. 3), FSC class 2640, Tire rebuilding and tire and tube repair materials, GSA region 3, District of Columbia, nnd Maryland, Virginia, and West Virginia, May 1, 1960-Apr. 30, 1961; prepared by GSA Region 3, Washington 25, D.C.