'The Rotundity of the Earth Actually Seen In A Photograph Taken From The Stratosphere', 1935. From The Popular Science Educator, Volume 2, edited by Charles Ray. [The Amalgamated Press, Ltd., London]
'The Rotundity of the Earth Actually Seen In A Photograph Taken From The Stratosphere', 1935. From The Popular Science Educator, Volume 2, edited by Charles Ray. [The Amalgamated Press, Ltd., London]
