Gerd Graßhoff, Bernhard Fritsch, 3D model of Copernicus Heliograph, with annotations, 2017, Copernicus' Heliograph, Edition Topoi, DOI: 10.17171/2-7-25-1
DOI: 10.17171/2-7-25-1 Publisher: Edition Topoi Subtitle: with annotations Creator: Gerd Graßhoff, Bernhard Fritsch Title: 3D model of Copernicus Heliograph Publication Year: 2017