NATIONAL GEOGRAPHIC SOCIETY, WASHINGTON, D.C.
National Geographic Society-National Bureau of Standards solar eclipse expedition of 1940 to Brazil. (Solar eclipse series, no.2)
NATIONAL GEOGRAPHIC SOCIETY, WASHINGTON, D.C. National Geographic Society-National Bureau of Standards solar eclipse expedition of 1940 to Brazil. (Solar eclipse series, no.2) © 20Apr42; AA398023. National Geographic Society (PWH); 3Dec69; R473737.
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