McDAC A Alternate at Astronautix
Image credit: McDonnell Douglas
Image source: Numbers Station
NASA Earth Orbital Space Station
Tag: MDAC
Phase A Orbiter by Ron Simpson
S-72-1201-X
Shuttle Program at Astronautix
Image credit: McDonnell Douglas
Image source: SDASM Archives
McDonnell Douglas Concept
MDC A by Robert McCall
Our World in Space
Robert McCall & Isaac Asimov
New York Graphic Society, 1974
McDAC A Alternate at Astronautix
Image credit: Robert McCall
Image source: Mike Acs
McDAC A Alternate
McDAC A Alternate at Astronautix
Image credit: McDonnell Douglas
Image source: Numbers Station
S-71-20741
Into The Unknown
by Don Dwiggins
Golden Gate Books, 1971
Shuttle Program at Astronautix
Image credit: McDonnell Douglas
Image source: Numbers Station
Model 260
Model 260 at Secret Projects Forum
Image credit: McDonnell Douglas
Image source: National Archives
numbers station 