. . "Astronomy." . . . . "The elements of theoretical and descriptive astronomy : for the use of colleges and academies" . "The elements of theoretical and descriptive astronomy : for the use of colleges and academies"@en . . "Elements of astronomy"@en . . . . "Elements of theoretical and descriptive astronomy, for the use of colleges and academies"@en . . . "The elements of theoretical and descriptive astronomy, for the use of colleges and academies"@en . "The elements of theoretical and descriptive astronomy, for the use of colleges and academies" . "The elements of theoretical and descriptive astronomy"@en . "The elements of theoretical and descriptive astronomy" . "Textbooks" . "Textbooks"@en . . . . . . . . . . . . "The Elements of theoretical and descriptive astronomy for the use of colleges and academies" . . . "The elements of theoretical and descriptive astronomy for the use of colleges and academies" . "The elements of theoretical and descriptive astronomy for the use of colleges and academies"@en . . . . . "Elements of theoretical and descriptive astronomy"@en . . . . . . . . . . . . . . . . . . . . . . . . "Astronomie Manuels d'enseignement secondaire." . .