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Astronomical background to the International Meridian Conference of 1884 | Analytt | 527(05) J Sadler, D. H. / I: Journal of the institute of navitagion. - Årg. 38 Nr. 2, 1985. - 191-199 | Sadler, D. H. | |
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Astronomy and navigation | Analytt | 527(05) J Sadler, D. H. / I: Journal of the institute of navitagion. - Årg. 22, 1969. - 71-76 | Sadler, D. H. | |