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Freedman, H. I.; Singh, M.; Easton, A. K.; Baggs, I. Mathematical models of population distribution within a culture group. (English) Zbl 1070.91518 Math. Comput. Modelling 29, No. 1, 57-67 (1999). MSC: 91D20 92D25 34C60 PDFBibTeX XMLCite \textit{H. I. Freedman} et al., Math. Comput. Modelling 29, No. 1, 57--67 (1999; Zbl 1070.91518) Full Text: DOI