Columbia subject headings:
Alemannic dialects--History--Maps.
German language--Middle High German, 1050-1500--Maps.
Maps.
Harvard subject headings:
Alemannic dialects--History--Maps.
German language--Dialects--Alemannic--History--Maps.
German language--Middle High German, 1050-1500--Maps.
Princeton subject headings:
German language--Dialects--Alemannic--History--Maps.
German language--Middle High German, 1050-1500--Maps.