"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," School of Music and Department of Chemistry Joint Lecture, Dartmouth College, Hanover, new Hampshire, May, 1971.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," Ottawa Guitar Society, Ottawa, Quebec, Canada, October, 1970.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," Twenty-fifth Jubilee Meeting Symposium on Molecular Spectroscopy and Structure, Ohio State University, Columbus, Ohio, September, 1970.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," School of Music and Department of Chemistry Joint Lecture, University of Minnesota, Minneapolis, Minnesota, April 1970.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," School of Music and Department of Chemistry Joint Lecture, University of Michigan, Ann Arbor, Michigan, November, 1969.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," School of Music and Department of Chemistry Joint Lecture, Massachusetts Institute of Technology, Boston, Massachusetts, November, 1969.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," American Guitar Foundation, Washington, D.C., May, 1969.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," Grosse Pointe Guitar Society, Detroit Institute of Arts, Detroit, Michigan, January, 1969.

"A New Look at the History and Design of String Instruments: Guitar, Viola, Violin," New York Society of the Classical Guitar, Illustrator's Hall, New York, New York, May, 1968.