Directors of Photography:
Library and Archives Canada: 35mm, 16mm.
"The fundamentals of checking are demonstrated in this instructional film."
University of Alberta, Edmonton, Alberta: 16mm.
"Two, and occasionally three, demonstrators show when and how to use a 'poke', 'hook', 'hip', and also how to 'cover' a man."
From the Catalogue of 16mm Educational Motion Pictures. Published by the Educational Media Division, Department of Extension, University of Alberta, Edmonton, 1967.