Georg_Hartmann Concentric_spheres Harmonices_Mundi
- These are all good choices. I'd worry about finding English sources on Georg Hartmann, but if you've already found some, then go for it. Try making these links into a list by putting a dot in front of them or into a numbered list by putting a pound/hash mark "#" in front of each. Good work, Kirwanfan (talk) 19:18, 18 September 2013 (UTC)