Secrets of Nature

http://dbpedia.org/resource/Secrets_of_Nature an entity of type: WikicatBlack-and-whiteFilms

Secrets of Nature was a 1922–1933 British short black-and-white documentary film series, consisting of 144 films produced by British Instructional Films, which filmmaker, historian and critic Paul Rotha described in 1930 as "the sheet anchor of the British film industry". rdf:langString
rdf:langString Secrets of Nature
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rdf:langString Secrets of Nature was a 1922–1933 British short black-and-white documentary film series, consisting of 144 films produced by British Instructional Films, which filmmaker, historian and critic Paul Rotha described in 1930 as "the sheet anchor of the British film industry".
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