The Film Archives of the National Geographic Society : An Introduction to the Past, Present and Future - Harris, Joshua S. En: IASA Journal : International Association of Sound And Audiovisual Archives = International Vereinigung Der Schall- und Audiovisuellen Archive = Association Internationale D´archives Sonores et Audiovisuelles. - Londres : International Association of Sound And Audiovisual Archives, 1991 - = ISSN 1021-562X. - Número 29 - July 2007, p. 47-57