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Recent researches on the air resistance of spheres (1928)
NASA Technical Reports Server (NTRS) · leaf 18
0 1 2 3 4 5>fl05 R.N. Fig.4 Effect of wires,in front of and on sphere,on drag of sphere.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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