Columbia subject headings:
Astrolabes--Early works to 1800.
Astronomy--Early works to 1800.
Johannes, von Gmunden, approximately 1385-1442. Corpus astronomicum.
Wiener codex 3055.
Harvard subject headings:
Astronomy--Early works to 1800
Johannes, von Gmunden, approximately 1385-1442. Corpus astronomicum.
Princeton subject headings:
Astrolabes--Early works to 1800.
Astronomy--Early works to 1800.
Johannes, von Gmunden, approximately 1385-1442. Corpus astronomicum.
Wiener codex 3055.