JG AutographsOtto C. Winzen - German-American WWII Aeronautics Engineer - Autographed 5 x 7" PhotographUS$10
JG AutographsJohn R. Pierce - American Engineer & Science Fiction Author - Autographed 5 x 7" PhotographUS$10
JG AutographsBradford Parkinson - Developer of Global Positioning System (GPS) - Autographed 8 x 10.5" SheetUS$10