Financiamentos para a construção da comunidade europeia
O Banco Europeu de Investimento em...
Population and housing census in the people's Republic of Bulgaria held on the 4th of December 1985 : methodology and main results
Theory and practice in the development of integrated systems of social and demographic statistics : proceedings of the International Expert Seminar held at Varna, Bulgaria, from 18 to 22 October 1988