Gaskill, N. B. 1., & Ustick, S. C. (1940). Imprints from the Press of Stephen C. Ustick with its several locations, together with some items which were published, but not printed by him, 1794-1836: To which are added interesting notes and comments. Washington, DC: [s.n.].

Gaskill, Nelson B. 1875-1964., and Stephen C. Ustick. Imprints From the Press of Stephen C. Ustick With Its Several Locations, Together With Some Items Which Were Published, but Not Printed By Him, 1794-1836: To Which Are Added Interesting Notes and Comments. Washington, DC: [s.n.], 1940.

Gaskill, Nelson B. 1875-1964., and Stephen C. Ustick. Imprints From the Press of Stephen C. Ustick With Its Several Locations, Together With Some Items Which Were Published, but Not Printed By Him, 1794-1836: To Which Are Added Interesting Notes and Comments. Washington, DC: [s.n.], 1940.