Author
United States. National Aeronautics and Space Administration
32
Jet Propulsion Laboratory (U.S.)
6
Goddard Space Flight Center
2
Ames Research Center
1
Center of Military History
1
Centre national d'études spatiales (France)
1
George C. Marshall Space Flight Center
1
Goddard Space Flight Center. Hydrological Sciences Branch
1
Lewis Research Center
1
Space Telescope Science Institute (U.S.)
1
United States. National Aeronautics and Space Administration,
1