monastery of Elchingen (OSB), esp. abbot Meinrad Hummel, OSB (1649-1706) and his "Ichnographia", a collection of so-called "Flurkarten" (1683-1699) ; Teutsche Mathematik (1696) ;
Meinrad Hummel, OSB (1649-1706) ;
cartographical drawing
http://www.landesarchiv-bw.de/plink/?f=1-512648
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