An Elementary Class Book on Astronomy: In Which Mathematical Demonstrations Are Omitted (Classic Reprint)/fr-ca/an-elementary-class-book-on-astronomy-in-which-mathematical-demonstrations-are-omitted-classic-reprint/D455EB92-2F95-411E-A43A-09098B86E9CF.htmlD455EB92-2F95-411E-A43A-09098B86E9CF