Books by Henry Gass:
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Gass, Henry: The Waltz C (HTML and page images at LOC)
Additional books by Henry Gass in the extended shelves:
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Gass, Henry: The C waltz (New York : Wm. A. Pond, [1876], 1876) (page images at HathiTrust)- Gass, Henry: Glide elite (Henry Gass, 1879), also by Henri Wehrmann (page images at HathiTrust)
Find more by Henry Gass at your library, or elsewhere.