Economic and Environmental Geology

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Fig. 4.

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Fig. 4. Significant classic and emerging topics sorted by the slope of the simple linear regression model (* represents p = 0.05, **represents p = 0.01, *** represents p = 0.001, and **** represents p = 0.0001).
Econ. Environ. Geol. 2021;54:353-64 https://doi.org/10.9719/EEG.2021.54.3.353
© 2021 Econ. Environ. Geol.