CBC Radio here in Canada has a show about the history of advertising, and this week they covered trade musicals--productions fro the 50s-80s that hired Broadway talent to presenta corporations new products. . Many of them will be well known to people on my FB, (Kander and Ebb's musical, Bock and Harnick's) but I had never heard the Harper Less anecdote. worth a listen. http://www.cbc.ca/radio/undertheinfluence/when-madison-avenue-met-broadway-the-world-of-industrial-musicals-1.3623539