A feasibility study of determining physical properties of the Martian atmosphere by use of solar occultation as seen from an artificial satellite. 1969. Government Documents: NAS 1.14:D-5443
Investigation of occultation and imagery problems for orbital missions to Venus and Mars. 1969. Government Documents: NAS 1.14:D-5104
Observations of the transit of Mercury November 11-12, 1940. 1942. Government Documents: N 14.6:15/PT.2
Equatorial observations 1893-1907 ; Miscellaneous astronomical papers ; Transit of Mercury 1894 ; List of Publications. 1911. Government Documents: N 14.6:6
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