DRAKE, R. H.
Cooperative pre-flight aeronautics tests. Test 4: Navigation, provisional form A. By R. H. Drake, K. V. Jackman & Meta Rothholz.
DRAKE, R. H. Cooperative pre-flight aeronautics tests. Test 4: Navigation, provisional form A. By R. H. Drake, K. V. Jackman & Meta Rothholz. © 10May43; AA437308. Educational Testing Service (PWH); 24Feb71; R501568.
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