The Hard Ones

Describes problems in designing, building and operating unmanned satellites for scientific research and practical applications such as communications and weather forecasting. Features the orbiting geophysical observatory.

Related films

Sources

  1. A-V Online (National Information Center for Educational Media). CD-ROM database of educational and documentary media, compiled and maintained by the National Information Center for Educational Media (NICEM). — title, year, creator, length, format, sound, description
  2. 16mm Filmography (legacy record) — catalog record