The Sorokin Lecture Series began in 1968 and has continued on an annual basis ever since. The Univesity of Saskatchewan published a number of these talks and the following are available online:
VI. D. 4. Sorokin, E. "My Life with Pitirim Sorokin". March 12, 1974.
VI. D. 5. Wallerstein, I. "Old Problems and New Syntheses: The Relation of Revolutionary Ideas and Practices." 1975.
VI. D. 7. Zimmerman, C.C. "Sorokin, The World's Greatest Sociologist: His Life and Ideas on Social Time and Change." 1968.