Columbia subject headings:
Conics, Spherical--Early works to 1800.
Desargues, Gérard, 1591-1661.
Perspective--Early works to 1800.
Harvard subject headings:
Conic sections--Early works to 1800.
Conics, Spherical--Early works to 1800.
Desargues, Gérard, 1591-1661.
Perspective--Early works to 1800
Princeton subject headings:
Conics--Early works to 1800.
Desargues, Gérard, 1591-1661.
Perspective--Early works to 1800.