ESC

John D. Clark

John Drury Clark, Ph.D. was an American rocket fuel developer, chemist, and science fiction writer.

Born1907-08-15, Fairbanks, Alaska
Died1987-07-06, Denville, New Jersey, USA
Linkshttps://en.wikipedia.org/wiki/John_Drury_Clark · http://www.isfdb.org/cgi-bin/ea.cgi?876