• 4 Memorial Library

• 3 Books
• 1 Journals, Magazines, Newspapers

• 2 Population
• 1 Basque language
• 1 Demographic aspects
• 1 Economic conditions
• 1 Education
• 1 Educational planning
• 1 Forecasting
• 1 Population forecasting

• 3 Instituto Vasco de Estadística
• 1 Jornadas Técnicas de Educación y Demografía (1989 : Bilbao, Spain)
• 1 Llera, Francisco, 1950-

• 3 País Vasco (Spain)
• 2 País Vasco
• 2 Spain

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