Sir Norman Lockyer, Nature Publishing Group, UM-Medsearch Gateway: THE TOTAL SOLAR ECLIPSE OF May 9, 1910. In: Nature. 83. Jahrgang, Nr.2121, 23. Juni 1910, S.494–495, doi:10.1038/083494a0 (google.com).
doi.org
Sir Norman Lockyer, Nature Publishing Group, UM-Medsearch Gateway: THE TOTAL SOLAR ECLIPSE OF May 9, 1910. In: Nature. 83. Jahrgang, Nr.2121, 23. Juni 1910, S.494–495, doi:10.1038/083494a0 (google.com).