References
Whittemore, D.H., inventor; Improved Apple Parer. 1866 Nov. 11. US59884.
Whittemore, D.H., inventor; Apple Parer and Slicer. 1880 April. 6. US226217.
Williams, D. [Ed.] The Centennial Exhibition: The Opening Ceremonies--The Attendance--Present Appearance of Various Departments. The Metal Worker: A Weekly Journal of the Stove, Tin, Plumbing House Furnishing Trade, 13 May 1876, Vol. 5, No. 20.