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|All Authors / Contributors:||
C G Abbot
|Notes:||"From the Smithsonian report for 1948, pages 167-176."
"Reprinted by permission from Leaflet No. 216, Astronomical Society of the Pacific, with revision and the addition of illustrations by the author."
|Description:||p. 167-175, 5 p. of plates : ill. ; 24 cm.|
|Series Title:||Smithsonian publication, 3955.|
|Responsibility:||by C.G. Abbot.|