Image: Charles Bartley
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Description: Charles Bartley who invented the solid rocket fuel later used in the space shuttle.
Title: Charles Bartley
Credit: From my family's personal collection of photographs. This is of Charles Bartley as he was my grandfather
Author: Unknown, but presumed to be family or a friend
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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