Federal supply schedule, amdt. 157, 159, 162-165, 168-169, 171, 174-176, 188, 238, 250, 254-255, 263, 271, 274, 278, 281, 285, 288, 298-300, 302, 306, 311, 313, 315-317, 319, 321, 325, 328-329; Aug. 14, 1947-Jan. 29, 1948.