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2. Spatial Aspects of Influenza Epidemics;Cliff,1986
3. The Diffusion of Influenza, Patterns and Paradigms;Pyle,1986
4. Atlas of Disease Distributions, Analytic Approaches to Epidemiological Data;Cliff,1988
5. Spatial aspects of epidemic control;Cliff;Prog. Hum. Geogr.,1989