Economic and Environmental Geology

Indexed in /covered by CAS, KoreaScience & DOI/Crossref:eISSN 2288-7962   pISSN 1225-7281

Fig. 5.

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Fig. 5. Time series evolution of (a) classic topics and (b) emerging topics. Turn point, 1994 (dashed grey vertical line), serves as the dividing year between the two time periods.
Econ. Environ. Geol. 2021;54:353-64
© 2021 Econ. Environ. Geol.