THREE BLACK SOFTCOVER NOTEBOOKS
Most likely, these are preparatory notes for the courses Beurling taught in Uppsala in 1944-1945. In Swedish.
I. Item 34: Hela funktioner (V.T. 1944) (pdf)
II. Item 35: Hela funktioner (H.T 1944) (pdf)
III. Item 36: Funktionalanalys (H.T. 1945) (pdf)
HARMONIC ANALYSIS. LECTURE NOTES FROM BEURLING'S LECTURES AT HARVARD (1948–49)
Item 44: Notes taken by John Wermer. pp. 1–232 (pdf)
One page written in Beurling's handwriting attached.
LECTURES ON THE WIENER-HOPF EQUATION
Item 63: Finite interval. Typed, 13 pages (pdf). Notes taken by Henry Pollak at Bell Lab.
Item 117: The semi-axis. Typed, 30 pages (pdf).
Item 124: The real axis. Handwritten, 4 pages (pdf). On the last page Beurling wrote: "Lecture notes taken by unknown from lectures at either Bell lab or Harvard, 48-49''
Item 71: New York University lectures on convexity and Banach spaces with applications to variational problems and harmonic analysis. February 1956, 39 pages.