UBV photometry from HK survey. I
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https://b2find.eudat.eu/dataset/d15d05b5-c3cd-5221-8bd2-197184ed25ae
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Photoelectric photometry is presented for a sample of 139 halo stars drawn an extension of the HK (Ca II H & K lines) objective-prism survey of Beers, Preston and Shectmann...
