Autor
A & E Home Video (Firma)
1
Arts and Entertainment Network
1
Central Operation of Resources for Educators (U.S.)
1
Curtis Productions (San Diego, Calif.)
1
Dallas County Community College District
1
Dallas Telecourses
1
Estados Unidos. National Aeronautics and Space Administration
1
Lyndon B. Johnson Space Center
1
New Video Group
1
Northern Illinois Learning Resources Cooperative
1