de Maricourt, active 13th century Pierre
The Letter of Petrus Peregrinus on the Magnet, A.D. 1269
de Maricourt, active 13th century Pierre · 2015
Public domain, Project Gutenberg. No sign-up.
Magnetism -- Early works to 1800
de Maricourt, active 13th century Pierre · 2015
Public domain, Project Gutenberg. No sign-up.