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A PLAN
FOR
SECURING OBSERVATIONS
OF THE
VARIABLE STARS.
BY
EDWARD C. PICKERING,
CAMBRIDGE: JOHN WILSON AND SON. University Press 1882.
A PLAN
FOR
SECURING OBSERVATIONS
OF THE
VARIABLE STARS.
BY
EDWARD C. PICKERING,
CAMBRIDGE: JOHN WILSON AND SON. University Press 1882.
A PLAN FOR SECURING OBSERVATIONS
OF THE VARIABLE STARS.
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