A hand-book for star double-altitudes : directions for selecting the stars, and showing how a single observer may take both the altitudes /

Main Author: Johnson, Alfred Challice
Format: Book
Published: London : J.D. Potter, 1898
Institution: Zentralbibliothek Zürich
All Items of this Institution: all items available from Zentralbibliothek Zürich
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Physical Description: 32 S.