Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Euler, Leonhard and Courvoisier, Leo and Schweizerische Naturforschende Gesellschaft",Leonhardi Euleri Commentationes astronomicae : ad praecessionem et nutationem pertinentes,,Auctoritate et impensis Societatis Scientiarum Naturalium Helveticae : Venditioni exponunt O. Füssli,1964,Leonhardi Euleri Opera omnia,,,,https://cir.nii.ac.jp/crid/1130282272771956736