Speckle interferometry at USNO. XXI.
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https://b2find.eudat.eu/dataset/f03e6e67-6ed4-5d80-81e2-ba4cdb291044
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The results of 2408 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system...
