Measuring rice paddy persistence spanning a century with Japan's oldest topographic maps: georeferencing the Rapid Survey Maps for GIS analysis. - David S. Sprague; Nobusuke Iwasaki; Shin Takahashi (Int. J. Geogr. Inf. Sci., 2007)

Land-use configuration under traditional agriculture in the Kanto Plain, Japan: a historical GIS analysis. - David S. Sprague (Int. J. Geogr. Inf. Sci., 2013)