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Index Field Book of the Stars by William Tyler Olcott
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THE CONSTELLATIONS OF SPRING.
Map showing the principal stars visible from Lat. 40° N. at 9 o'clock April 1st.
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Index Field Book of the Stars by William Tyler Olcott
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THE CONSTELLATIONS OF SPRING.
Map showing the principal stars visible from Lat. 40° N. at 9 o'clock April 1st.
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