IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. United States Army Air Forces Type ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. United States Air Force Type P-1A ...
Researchers have compared the relative safety afforded by two 1930-vintage leather football helmets and 10 modern football helmets during impacts to players' heads. These researchers found that all 10 ...
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