Columbia subject headings:
Christian pilgrims and pilgrimages--Meuse River Valley--Bibliography.
Christian pilgrims and pilgrimages--Rhine River Valley--Bibliography.
Meuse River Valley--Church history--Bibliography.
Rhine River Valley--Church history--Bibliography.
Harvard subject headings:
Christian pilgrims and pilgrimages--Meuse River Valley--Bibliography.
Christian pilgrims and pilgrimages--Rhine River Valley--Bibliography.
Meuse River Valley--Church history--Bibliography.
Rhine River Valley--Church history--Bibliography.
Princeton subject headings:
Christian pilgrims and pilgrimages--Meuse River Valley--Bibliography.
Christian pilgrims and pilgrimages--Rhine River Valley--Bibliography.
Meuse River Valley--Church history--Bibliography.
Rhine River Valley--Church history--Bibliography.