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
MDC A by Robert McCall
Tag: McDAC
McDAC A Alternate
McDAC A Alternate at Astronautix
Image credit: McDonnell Douglas
Image source: Numbers Station
Spencer Taylor
Don Lauer
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
McDonnell Douglas DC AST
Supersonic Transport at Wikipedia
Image credit: McDonnell Douglas
Image source: National Archives
MDAC Phase B
Shuttle Program at Astronautix
Image credit: McDonnell Douglas
Image source: Stellar Views
numbers station 
