Alexander von Humboldt: All writings (essays, articles, essays). Berne Edition (SNF) www.humboldt.unibe.ch (Only in German)
Alexander von Humboldt: All writings (essays, articles, essays). Berne Edition (SNF) www.humboldt.unibe.ch (Only in German)
Family name atlas of German-speaking Switzerland. Family name atlas of German-speaking Switzerland. (Head Prof. Kempf) Family name atlas of German-speaking Switzerland.