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Elements of trigonometry, plane and spherical- with applications to heights and distances, the areas of polygons, surveying, navigation, and the solution of astronomical problems (1858) (14784891693).jpg - Fæ

Elements of trigonometry, plane and spherical- with applications to heights and distances, the areas of polygons, surveying, navigation, and the solution of astronomical problems (1858) (14765024945).jpg - Fæ

Journal de mathématiques pures et appliquées, Série 2, Tome 3, 1858.djvu - Nalou

Leibniz - Mathematische Schriften, Gerhardt vol 5.djvu - Valp