Keller, David H[enry] M.D.(1880-1966). The Sign of the Burning Hart. Saint-Lo, France: Imprimerie de la Manche, 1938.

Keller, David H[enry] M.D.(1880-1966). "Service First" In Amazing Stories. Vol.  4.1 ., 1931.

Keller, David H[enry] M.D.(1880-1966). "Stenographers' Hands" In Amazing Stories Quarterly (New York). Vol. 1.4., 1928.