1. Patients in Danish psychiatric hospital. Results of a census in 1957. With an appendix of tables and graphs;Arentsen,1957
2. Incidence of neurosis in psychiatric and other medical services in a Danish county;Bille;Dan. med. Bull.,1963
3. Five years later. A comparison between census studies of patients in psychiatric institutions in Denmark in 1957 and 1962. With an appendix of tables and graphs;Juel-Niclsen,1963
4. Geronto-psychiatric period-prevalence investigation in a geographically delimited population;Niclsen;Acta psychiat. scand.,1962
5. Mental health service planning in Denmark;Strömgren;Dan.-med. Bull.,1958