Columbia subject headings:
Harvard subject headings:
Danube River Watershed--Antiquities--Congresses.
Excavations (Archaeology)--Danube River Watershed--Congresses.
Excavations (Archaeology)--Rhine River Watershed--Congresses.
Paleolithic period--Danube River Watershed--Congresses.
Paleolithic period--Danube River Watershed.
Paleolithic period--Rhine River Watershed--Congresses.
Paleolithic period--Rhine River Watershed.
Rhine River Watershed--Antiquities--Congresses.
Princeton subject headings:
Paleolithic period--Danube River Watershed--Congresses.
Paleolithic period--Rhine River Watershed--Congresses.