Hayward, N. (1864). Petition of Nathaniel Hayward: For an extension of his invention for using sulphur with India rubber. Bulletin Job Print. Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHayward, Nathaniel. Petition of Nathaniel Hayward: For an Extension of His Invention for Using Sulphur with India Rubber. Norwich [Conn.]: Bulletin Job Print. Office, 1864.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHayward, Nathaniel. Petition of Nathaniel Hayward: For an Extension of His Invention for Using Sulphur with India Rubber. Bulletin Job Print. Office, 1864.
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