J. Heun et Vulto, C.,
« Evaluation of sector approaches in the water sector : country report Yemen : final ». CDP, Consultants for Development Programmes, Utrecht, The Netherlands, p. x, 57 p. : map, 25 tab. , 2008.
B. van Woersem et Heun, J.,
« Evaluation of sector support and approaches in the water sector : final report ». CDP, Consultants for Development Programmes, Utrecht, The Netherlands, p. vii, 96 p. : 16 fig., 18 tab., 2008.
