Geographia Polonica (1992) vol. 59

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Sudden changes in demographic processes: Two applications of catastrophe theory

Ryszard Domański

Geographia Polonica (1992) vol. 59, pp. 55-68

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Ryszard Domański, Academy of Economics Poznań, Department of Spatial and Environmental Economics al. Niepodległości 10, 60-967 Poznań, Poland