Determining the Effectiveness of Programmed Instruction - A Training Course Example - ASKINS, BILLY E. (Periodicals Archive Online (PAO), 1970)
http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5030-1970-045-01-000018
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