Datasets
You, L., Z. Guo, J. Koo, W. Ojo, K. Sebastian, M.T. Tenorio, S. Wood, U. Wood-Sichra. Spatial Produciton Allocation Model (SPAM) 2000 Version 3 Release 1. http://MapSPAM.info. (Your accessing date - e.g. Nov. 20, 2009)
Paper
You, L., S. Wood, U. Wood-Sichra. 2006. Generating global crop maps: from census to grid. Selected paper, IAAE (International Association of Agricultural Economists) Annual Conference, Gold Coast, Australia.
