Resources found in the Smithsonian National Postal Museum Library are:
- Dickie, E. “Lorenzo J. Hatch.” The China Clipper (September 1966). Vol. XXX (6): 91 – 93.
- Haverbeck, H.D.S. “The Collection of Essays and Proofs of William A. Grant.” The China Clipper (January 1964). Vol. XXVIII (2): 23 – 33.
- Johnson, M. “The Designer of the Peking Junks.” The China Clipper (January 1949). Vol. XII (6): 77 – 79. Kundu, S. “Chinese Die Proofs.” EnRoute (January – March 1998). Vol 7 (1): 1 – 2.
