Johannes Herman Frederik Umbgrove HFRSE (5 February 1899 Hulsberg (Limburg) – 14 June 1954 Wassenaar), called in short Jan Umbgrove, was a Dutch geologist and earth scientist.
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JohannesHermanFrederikUmbgrove HFRSE (5 February 1899 Hulsberg (Limburg) – 14 June 1954 Wassenaar), called in short Jan Umbgrove, was a Dutch geologist...
geologist were Berend George Escher, JohannesHermanFrederikUmbgrove, discoverer of Bushveld complex Gustaaf Adolf Frederik Molengraaff and discoverer of gravity...
of penthode and gyrator Alexander Tzonis, Greek architect JohannesHermanFrederikUmbgrove, Dutch geologist Marc de Vries, Dutch technologist Henk van...
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