K. Batjes-Sinclair,
«Technical consultation on assessing the performance and impact of agricultural information products and services : proceedings of a CTA/IICD/LEAP-IMPACT Technical Consultation, Bonn, Germany, 9-12 October 2001», vol. no. 8027. Technical Centre for Agriculture and Rural Cooperation (CTA), Wageningen, The Netherlands, p. iv, 169 p.: fig., tabs., 2002.