Columbia subject headings:
Panagiōtopoulos, Iōannēs Michaēl, 1901---Criticism and interpretation.
Harvard subject headings:
Panagiōtopoulos, Iōannēs Michaēl, 1901---Criticism and interpretation--Congresses.
Princeton subject headings:
Panagiōtopoulos, Iōannēs Michaēl, 1901-1982--Criticism and interpretation.