1 Subjects: “...exploration...”

2 Subjects: “...geophysical exploration...”

3 Subjects: “...; Umfrage; Explorative Studie; Interview; Nordrhein-Westfalen; Deutschland...”

4 Subjects: “...seismic exploration...”

5 Subjects: “...H2 exploration...”

6 Subjects: “... <Methode>, Explorative Studie, Internationaler Vergleich, Tagungsbericht, Deutschland, Österreich, Dänemark...”