Não informado. (1872). Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress.
Chicago-referens (17:e uppl.)Não informado. Official Gazette of the United States Patent Office. Washington: U.S. Patent Office, Department of Congress, 1872.
MLA-referens (8:e uppl.)Não informado. Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress, 1872.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.