Columbia subject headings:
Harvard subject headings:
Mittelberger, Gottlieb--Travel--Pennsylvania.
Pennsylvania--Description and travel--Early works to 1800.
Pennsylvania--Emigration and immigration--Early works to 1800.
Princeton subject headings:
Germans--Pennsylvania--History--18th century.
Mittelberger, Gottlieb--Travel--Pennsylvania.
Pennsylvania--Description and travel--Early works to 1800.