Ulbo de Sitter

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1	558 BIOGRAPHIES v.i WiLLEM DE S I T T E R Add to Reading List Source URL: www.dwc.knaw.nl Language: English - Date: 2009-02-28 18:00:00 Astronomy Willem de Sitter Jacobus Kapteyn Arthur Eddington Leiden Observatory Ulbo de Sitter General relativity Albert Einstein Jan Oort Science Cosmologists Academia
2	BIOGRAPHIES 599 Add to Reading List Source URL: www.dwc.knaw.nl Language: English - Date: 2009-02-28 18:00:00 Geography of Belgium Geography of the Netherlands Gracht Water transport infrastructure Europe Delft Amsterdam Ulbo de Sitter Gustaaf Adolf Frederik Molengraaff Geography of Europe Netherlands Canals