title: [Demographic projections, (Part 5): problems of projecting births].
mesh_terms: D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005298:Fertility; D005544:Forecasting; D011044:Poland; D011153:Population; D011157:Population Dynamics; D012106:Research; D013223:Statistics as Topic
keywords: Demographic Factors; Developed Countries; Eastern Europe; Estimation Technics; Europe; Fertility; Poland; Population; Population Dynamics; Population Forecast; Population Projection; Research Methodology
vernacular_title: Prognozowanie demograficzne (V): problemy prognozowania urodzen