Columbia subject headings:
Geology--Austria--Styria--Periodicals.
Groundwater--Austria--Styria--Periodicals.
Hydrology--Austria--Styria--Periodicals.
Harvard subject headings:
Princeton subject headings:
Geology--Austria--Styria--Periodicals.
Groundwater--Austria--Styria--Periodicals.
Hydrology--Austria--Styria--Periodicals.