Columbia subject headings:
Authorship.
Loetscher, Hugo, 1929-2009--Aesthetics.
Harvard subject headings:
Authorship
Loetscher, Hugo, 1929---Aesthetics.
Loetscher, Hugo, 1929-2009--Aesthetics.
Princeton subject headings:
Authorship.
Loetscher, Hugo, 1929-2009--Aesthetics.