Não informado. (1872). Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Official Gazette of the United States Patent Office. Washington: U.S. Patent Office, Department of Congress, 1872.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress, 1872.
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