The Emergence of learning societes : Who participates in adult learning? - Bélanger, Paul; Valdivieso, Sofia; Rubenson, Kjell; Hasan, Abrar; Valdivielso, Sofía; Bialecki, Ireneuz; Borkowsky, Anna; Doray, Pierre; Kamp der van, Max; Bélanger, Paul; Valentine, Thomas (Pergamon, 1997)