Keywords: Constantin von Grewingk2.jpeg Constantin von Grewingk 1819-87 http //dspace utlib ee/dspace/handle/10062/2805 before 1887 author PD-old ja Original upload log de wikipedia Constantin+von+Grewingk2 jpeg 2009-10-04 16 52 Fulmen 224×278× 4731 bytes <nowiki> Andere Versionen </nowiki> Geologists from Estonia 1819 births 1887 deaths |