David S. F. Portree (@dsfpspacefl1ght) 's Twitter Profile
David S. F. Portree

@dsfpspacefl1ght

Historian in STEM. Former NASA and US Geological Survey historian, educator, and archivist. Public historian. I like to tell people about cool things. He/him.

ID: 3282975180

linkhttp://spaceflighthistory.blogspot.com/ calendar_today18-07-2015 04:59:07

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