Columbia subject headings:
Art historians--Austria--Biography.
Pollak, Ludwig, 1868- Tagebücher.
Pollak, Ludwig, 1868---Diaries.
Harvard subject headings:
Art historians--Austria--Biography.
Pollak, Ludwig, 1868- Tagebücher.
Pollak, Ludwig, 1868---Diaries.
Princeton subject headings:
Art dealers--Austria--Diaries.
Art dealers--Italy--Rome--Diaries.
Art--Expertising--Diaries.
Pollak, Ludwig, 1868-