Martin Elmer Johnson and Osa Helen Johnson were married American adventurers and documentary filmmakers. Photographers, explorers, marketers, naturalists and authors, the Johnsons studied the wildlife and peoples of East and Central Africa, the South Pacific Islands and British North Borneo. In the first half of the 20th century, they explored other continents and brought back film footage and photographs, offering many Americans their first understanding of these foreign lands. No. 1 on The New York Times Nonfiction best seller list for 5 weeks, from the issue of June 10, 1940. Wiki link