1. Copernicus's Heliograph at Olsztyn: The 500th Anniversary of a Scientific Milestone. Issue 11 (12th October 2018) Authors: Graßhoff, Gerd; Fischer, Gordon Journal: Annalen der Physik Issue: Volume 530:Issue 11(2018) Page Start: n/a Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗