00572nmm a2200193Ia 4500008004100000020001800041041000800059100002200067245003200089264006600121300001800187650002700205700002200232700002100254700002800275856005100303942000700354999001700361251105s9999||||xx |||||||||||||||||und|| a9788497887434 aeng aBen Youssef, Adel 4aThe Economics of E-learning a[Madrid, España] :bUniversitat Oberta de Catalunya, c2008 a224 páginas aEconomics and Business aBen Youssef, Adel1 a Dahmani, Mounir1 a Castillo Merino, David uhttps://public.digitaliapublishing.com/a/20577 cCF c62702d62702