This publication is a result of a project designed to establish an information system on international migration in Europe. It consists of "(a) an inventory of sources of international migration data for most European countries which lists the sources available on stocks and flows of foreign nationals and immigrants together with the concepts and definitions employed and an assessment of their accuracy; (b) a collection of the main statistical data from the most useful national statistical sources to allow stock and flow numbers and characteristics for each country to be identified. This statistical base is supplemented by an extensive bibliography of recent works on European international migration. The information system has been used to produce a report (Section Two) which identifies current patterns and trends of stocks and flows of international migrants in Europe and indicates the processes that are creating them." (EXCERPT)