"Astronomy Elementary and popular works, 1934." . . . . . . . . . . . . "A key to the stars : [illust. and diagrams]"@en . . . . . . "A Key to the Stars ... Second edition" . "A key to the stars. [With plates.]"@en . "A Key to the Stars ... Second edition"@en . . . . "A key to the stars"@en . "A key to the stars" . . . . . "A Key to the Stars"@en . . "A Key to the Stars ... Third edition"@en . . "A Key to the Stars ... Third edition" . . . . . "A Key to the Stars. (Cheap edition.)"@en . "A Key to the Stars. (Cheap edition.)" . .