Columbia subject headings:
Copernicus, Nicolaus, 1473-1543--Anniversaries, etc.
Copernicus, Nicolaus, 1473-1543--Travel--Italy.
Italy--Description and travel--Early works to 1800.
Italy--Description and travel.
Harvard subject headings:
Copernicus, Nicolaus, 1473-1543--Anniversaries, etc., 1973.
Copernicus, Nicolaus, 1473-1543--Travel--Italy.
Italy--Description and travel--Early works to 1800.
Princeton subject headings:
Copernicus, Nicolaus, 1473-1543--Anniversaries, etc., 1973.
Copernicus, Nicolaus, 1473-1543--Travel--Italy.
Italy--Description and travel.