Columbia subject headings:
Boring--Germany--Oberpfalz Region.
Earth (Planet)--Crust.
Geology--Germany--Oberpfalz Region.
Harvard subject headings:
Boring--Germany (West)--Oberpfalz Region.
Boring--Germany--Oberpfalz Region.
Earth (Planet)--Crust.
Geology--Germany (West)--Oberpfalz Region.
Geology--Germany--Oberpfalz Region.
Princeton subject headings:
Boring--Germany (West)--Oberpfalz Region.
Earth (Planet)--Crust.
Geology--Germany (West)--Oberpfalz Region.