Douglass, AE. 1910. ?Drawings Of A Comet?. Popular Astronomy. Popular Astronomy.

Douglass, AE. 1899. ?A Summary Of Planetary Work At The Lowell Observatory And The Conditions Under Which It Has Been Performed?. Popular Astronomy. Popular Astronomy.

Douglass, AE. 1897. ?Atmosphere, Telescope And Observer?. Popular Astronomy. Popular Astronomy.