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2. Comparison of spatially filtered geologic maps;Eschner;Geol. Soc. America Bull.,1979
3. General geology and major oil fields of the Reconcavo Basin, Brazil;Ghignone,1968
4. Trend-surface analysis of regional and residual components of geologic structures in Kansas;Merriam;Kansas Geol. Survey Sp. Dist. Publ.,1964
5. Geologic model-study using trend-surfaces analysis;Merriam;Jour. Geology,1966