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Elsevier‎(2003)‎

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By Psacharopoulos G.   in International Journal of Educational Development

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Elsevier‎(2003)‎

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By Psacharopoulos G.   in World Development

ISSN:0305-750X|24|1|201-201

Elsevier‎(1996)‎

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By Psacharopoulos G.   Arieira C.R.   Mattson R.   in Economics of Education Review

ISSN:0272-7757|16|4|395-406

Elsevier‎(1997)‎

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