NG'ETHE, Njuguna - SUBOTZKY, George - AFETI, George. Differentiation and articulation in tertiary education systems : a study of twelve African countries. Washington, D.C. : The World Bank, 2008. 170 s. World Bank working paper, no. 145. ISBN 978-0-8213-7546-4. [Copy count : 1, currently available 1, at library only 0]