According to the website https://v1.archmathsci.org/catalogue/general-chronology-of-recordings-since-1973/chronology-of-recordings-1973-1980/1973-recordings/ There are Lecture Courses by Alexandre GROTHENDIECK three Lecture Courses on respectively
Algebraic Geometry
The Theory of Algebraic Groups
Topos Theory The copyright of all these recordings is that of the Department of Mathematics of SUNY at Buffalo to whose representatives
But I can't find them, is there anyone have found them? Thank you.