Columbia subject headings:
Education--Philosophy.
Education.
Learning, Psychology of.
Popper, Karl R. (Karl Raimund), 1902-1994.
Harvard subject headings:
Education--Philosophy
Knowledge, Theory of
Popper, Karl R. (Karl Raimund), 1902-1994--Contributions in education.
Popper, Karl R. (Karl Raimund), 1902-1994.
Princeton subject headings:
Education--Philosophy.
Knowledge, Theory of.
Popper, Karl R. (Karl Raimund), 1902-1994.