The first publication of cancer mortality data in Po ners, research workers and political authorities for land took place 100 years ago in 1888. The evalua information on frequencies, time trends, and spatial tion of such data was greatly enhanced in the early distributions of the different cancer sites. 1960s when the Polish Cancer Registry was estab Secondly, it may promote epidemiological research lished at the Maria Sldodowska-Curie Memorial on causal factors determining cancer occurrence in Cancer Institute in Warszawa. Data from this regis Poland. In this connection, it has to be kept...