Report on educational and documentary films /
British Association for the Advancement of Science.Meeting(1930 :Bristol, England)
Gregory, Richard,Sir,1864-1952.
London : British Association for the Advancement of Science,
[1930]
Cover title.
"The following communications were among those presented at the Annual Meeting of the Association in Bristol, September 3-10, 1930, and is [sic] reprinted from the report of that meeting"--verso of front cover.
Documentary films