TY - GEN A1 - Kleefeld, Johann Gottfried (1763-1845) L2 - http://pbc.gda.pl/Content/72969 KW - meteorology KW - manuscript KW - GdaƄsk (Poland ; city) KW - Naturforschende Gesellschaft in Danzig T1 - Kleefelds Beobachtungen 1807 UR - http://pbc.gda.pl/dlibra/publication/edition/72969 ER -