@INBOOK {NORMAN:2017, title = {Systems research for agricultural development: past, present and future}, author = {Norman, D and Atta-Krah, K. }, editor = {Oborn, I. and Vanlauwe, B. and Phillips, M. * and Thomas, R. and Brooijmans, W. }, series = {Earthscan Food and Agriculture}, year = {2017}, type = {In: Sustainable intensification in smallholder agriculture: an integrated systems research approach, edited by Oborn, I., Vanlauwe, B., Phillips, M., Thomas, R., Brooijmans, W. and Atta-Krah, K.}, pages = {19--42}, chapter = {2}, publisher = {Routledge}, address = {London, UK}, isbn = {978-1-315-61879-1}, note = {WAHub}, url = {https://doi.org/10.4324/9781315618791}, doi = {10.4324/9781315618791}, }