Teimpléad:Scientific American Frontiers
"Scientific American Frontiers, on season 1" (en). Scientific American Frontiers. PBS (1990–1991). Cartlannaíodh an bunleathanach ar 2006.
"Scientific American Frontiers, on season 1" (en). Scientific American Frontiers. PBS (1990–1991). Cartlannaíodh an bunleathanach ar 2006.