John Popper Guests With Phish During 'M' Set On This Date In 1996
David Popper, Maria Kliegel, Gerhard Markson, Nicolaus Esterházy Sinfonia - Romantic Cello Showpieces: Im Walde / Requiem / Hungarian Rhapsody (CD) - Amoeba Music
Karl Popper - Wikipedia
Readings On Karl Popper | PDF | Falsifiability | Pseudoscience
Karl Popper | Biography, Books, Theory, & Facts | Britannica