Properties of Light (1971) Credits

Opening Logos

 * A Free Service of Your Local Public Library and the Pennsylvania Public Libraries Film Center of the State Library of Pennsylvania

Opening Titles

 * "Properties of Light"
 * © General Electric Company 1971

Ending Credits

 * A General Electric Educational Film
 * Audio-Visual Communications System Schenectady, New York
 * © General Electric Company 1971

Closing Logos

 * General Electric