Encyclopaedia Britannica Educational Corporation ; a production for the Open University ; BBC ; in association with Penn State, Division of Media and Learning Resources ; produced by Rissa De La Paz
a film by Deepa Dhanraj ; a D & N production for BBC and TVE in association with the One World Group of Broadcasters ; producer/director, Deepa Dhanraj
a WGBH production in association with the British Broadcasting Corporation for Nova ; written and presented by David McCullough ; produced and directed by Carl Charlson
producer [for Tigress Productions], Sarah Williams ; director, Justine Kershaw ; producers [for WNET-Nature], Jessica Siegel, Jill Clarke ; a Tigress production ; a co-production of Thirteen/WNET and the BBC
a co-production of ABC/Kane Productions and the BBC, in association with Trebitsch Produktion International GmbH and PBS ; executive producers, Alex Gregory and Dennis B. Kane ; written by Alex Gregory ; produced by Neil Lucas
produced and directed by Mark Anderson and Charles Bruce ; a coproduction by WGBH/Boston and Brook Associates in association with the BBC and Canal Plus
produced by Singing Nomads in association with International Broadcasting Trust for BBC and ABC-TV ; director and writer, Sally Ingleton ; producers, Sally Ingleton and Denise Patience
WNET ; produced in association with the Canadian Broadcasting Corporation and the British Broadcasting Corporation ; produced by Jac Venza ; directed by Jerome Schnur