Books by Basil Sheldon Sprague:
Books in the extended shelves:
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Sprague, Basil Sheldon, 1920-: High strength, high modulus fibers by pyrolysis of polymeric fibers (Air Force Materials Laboratory, Nonmetallic Materials Division, Air Force Systems Command, 1966), also by Dagobert E. Steutz, Leo Rudolph Belohlav, and Celanese Research Company (page images at HathiTrust)
Find more by Basil Sheldon Sprague at your library, or elsewhere.