اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
"Litteraturverzeichniss": p. [517]-545
I. Grundzüge der theoretischen astrophotometrie. -- II. Die photometrischen apparate. -- III. Resultate der photometrischen beobachtungen am himmel. -- Anhang