Theory of population transport.
D000367:Age Factors; D000818:Animals; D001723:Birth Rate; D002417:Cattle; D004641:Emigration and Immigration; D005163:Factor Analysis, Statistical; D006801:Humans; D008433:Mathematics; D008954:Models, Biological; D009026:Mortality; D011156:Population Density; D011336:Probability; D013997:Time Factors