Israel Kirzner Lecture on Advertising from 1971
The Foundation for Economic Education is the oldest free market organization in the US, and has a wealth of archival material which they have been making available online for all to see. This material includes letters, lectures, audio recordings, and video recordings. And, of course, The Freeman archives is filled with insightful commentary from some of the leading free market thinkers of the 20th century.
In a recent facebook post, FEE has made available this lecture by Israel Kirzner on advertising.