Privilege for Squaring of the circle, Delft (1584)
Source: Universiteitsbibliotheek Leiden, THYSIA 1311:1; 2009 D 20
Citation: Privilege for Squaring of the circle, Delft (1584), Primary Sources on Copyright (1450-1900), eds L. Bently & M. Kretschmer, www.copyrighthistory.org