Columbia subject headings:
Harvard subject headings:
Geometrie due sunt partes principales.
Geometry--History--Sources.
Measurement--History--Sources.
Quadrans vetus.
Quadrants (Astronomical instruments)--History--Sources.
Princeton subject headings:
Geometrie due sunt partes principales.
Geometry--History--Sources.
Measurement--History--Sources.
Quadrans vetus.
Quadrants (Astronomical instruments)--History--Sources.