Intended as a follow-up to a 1969 survey of educational research institutes and projects in various European countries, this volume covers research units and projects of five European socialist countries for 1970-72. The main purpose of this raw, working document is to increase the exchange of information on educational research. Data was collected from Bulgaria, Hungary, Poland, Romania, and Yugoslavia with the help of UNESCO, through whom a special questionnaire was sent. Each report contains the following institute data: name, address, director, year of foundation, aims and functions, administration, source of funds, total budget, staff recruitment and training, facilities, research programme, national and international collaboration, priority research areas, dissemination and application of results, publications, and research projects descriptions. The volume, arranged in alphabetical order by country, in English and French as well as the original language of the reply. Two indices contain an index of research projects in alphabetical order by topic and an alphabetical list of names of the directors of the educational research institutions and of the leaders of particular research projects. (KSM)