DRAKE, R. H.
Cooperative pre-flight aeronautics tests. Test 5: Radio and communications and civil air regulations, provisional form A. By R. H. Drake, K. V. Jackman & Alexander Joseph.
DRAKE, R. H. Cooperative pre-flight aeronautics tests. Test 5: Radio and communications and civil air regulations, provisional form A. By R. H. Drake, K. V. Jackman & Alexander Joseph. © 10May43; AA437309. Educational Testing Service (PWH); 24Feb71; R501569.
Educational Testing Service|PWH