Books by Oscar Edward Harder:
Books in the extended shelves:
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Harder, Oscar Edward: Alloys of chromium, copper and nickel ([Urbana, 1917), also by David Ford McFarland (page images at HathiTrust)- Harder, Oscar Edward: Alloys of chromium, copper and nickel (1915) (page images at HathiTrust; US access only)
Find more by Oscar Edward Harder at your library, or elsewhere.