Results of Observation with the Zenith Telescope of the Sayre Observatory from April 1, 1876, to December 27, 1893
Published in Transactions of the American Philosophical Society, in 1902, in volume 20, issue 3, pages 280-397
Date published:1902
Published in Transactions of the American Philosophical Society, in 1902, in volume 20, issue 3, pages 280-397
Date published:1902