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Thenkabail, P.S. et al. 2017. Global 30-m Cropland Extent, Areas, and Accuracies using Landsat Time-series Data, Machine Learning Algorithms, and Cloud Computing. Workshop on Global Food Security-Support Analysis Data @ 30 m (GFSAD30) held @ Dallas Peck Auditorium, USGS HQ, 12201 Sunrise Valley Drive, Reston, Virginia.