The Technical Talk: More Effective Use Of Visual Aids
http://www.jacweb.org/Archived_volumes/Text_articles/V2_Jobst.htm
  peer-reviewed

Jobst, Jack W.
JAC
1981

Abstract:

While most technical writing teachers assign the oral report and insist on visuals, very few offer their students good classroom examples of technical report visual aids. However, a set of 35 mm slides on one teaching topic could be easily produced with neither expensive equipment nor much ability in graphic design.