Results of measures made at the Royal Observatory, Greenwich, of photographs of the sun taken at Greenwich, at the Cape, and in India in the year ...
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Results of measures made at the Royal Observatory, Greenwich, of photographs of the sun taken at Greenwich, at the Cape, and in India in the year ...
H.M.S.O
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Greenwich photo-heliographic results
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Note
Description based on: 1922 (1922)
Under the direction of Frank Dyson
Published by order of the Board of Admiralty, in obedience to His Majesty's command