Thirteenth Regional Committee for Europe: Stockholm, 17-20 September 1963: smallpox in Europe, 1958-1963
Citation
Regional Committee for Europe, 13th session. (1963). Thirteenth Regional Committee for Europe: Stockholm, 17-20 September 1963: smallpox in Europe, 1958-1963. World Health Organization. Regional Office for Europe. https://iris.who.int/handle/10665/359791