Não informado. (1872). Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Official Gazette of the United States Patent Office. Washington: U.S. Patent Office, Department of Congress, 1872.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress, 1872.
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