Wilson, Herbert C. |
Longitude determinations / under the direction of William W. Payne ; by H.C. Wilson and Charlotte R. Willard |
Northfield (Minn.) : Goodsell observatory, 1901. |
Wilson, Herbert C. |
Observations of sunspots and measures of solar photographs taken in the years 1889 to 1892 / under the direction of William W. Payne ; by H.C. Wilson and Charlotte R. Willard and A.G. Sivaslian |
Northfield (Minn.) : Goodsell observatory, 1901. |