1. The spatial behavior of hospital patients;Earickson,1970
2. Factors influencing the transmission of leprosy;Brown;Trans. R. Soc. trop. Med. Hyg.,1959
3. Central Places in Southern Germany;Christaller,1966
4. Factors influencing distances traveled to hospitals;Morrill;Econ. Geogr.,1970
5. The Organization of Medical Care Under Social Security;Roemer,1969