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17
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Active since
1957
R. A. Rach is an author specializing in information retrieval, photometry, and text mining.
Top concepts
PhysicsPhotometryEngineeringText MiningAstrodynamicsInformation Retrieval
Publications per year
1957–1957
Relative proper motions of stars in the region of the open cluster NGC 6940.
S. Vasilevskis, R. A. Rach · The Astronomical Journal · 1957 · 17 citations
Engineering, Relative Proper Motions, Full-text Database +16
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