Twilight intensity at 20⁰ elevation ; results of observations /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
[Cambridge, Mass.] :
Harvard University, Division of Engineering and Applied Physics,
1961.
|
| Series: | Scientific report ;
no. 2 |
| Subjects: |
| Item Description: | On cover: Blue Hill Meteorological Observatory. "AF 19-604 (4546)" Prepared for Geophysics Research Directorate, Air Force Cambridge Research Center."." |
|---|---|
| Physical Description: | 2 volumes : illustrations ; 28 cm. |