المؤلفون: Dafflon, Bernard, Madiès, Thierry, Ky, Abraham
المصدر: :47-106
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/978-0-8213-9613-1http://elibrary.worldbank.org/doi/abs/10.1596/9780821396131_CH02http://elibrary.worldbank.org/doi/pdf/10.1596/9780821396131_CH02http://elibrary.worldbank.org/doi/abs/10.1596/978-0-8213-9613-1
المؤلفون: Ky, Abraham
المصدر: 2009