Cover of the pulp magazine Amazing Stories.
Cover of the pulp magazine Amazing Stories (January 1930, vol. 4, no. 10).
Cover of the pulp magazine Amazing Stories (May 1930, vol. 5, no. 2).
Cover of the pulp magazine Amazing Stories (October 1930, vol. 5, no. 7) featuring "Skylark Three" by Edward E. Smith, PhD.