Test sets EE-65 and EE-65-A - USA Voorschrift, Technical Manual, 11-361 Test set TS-159/TPX - USA Voorschrift, Technical Manual, 11-1243 Test set I-157-A (tube and set tester, precision model 920P) - USA Voorschrift, Technical Manual, 11-1209 Test equipment RC-68 and RC-68-A - USA Voorschrift, Technical Manual, 11-1053 Cave of the Winds : the remarkable history of the Langley Full-Scale Wind Tunnel
