Biomes of the World [cite]

©2012 The Trustees of Columbia University in the City of New York. Center for International Earth Science Information Network (CIESIN)/Columbia University. 2012. National Aggregates of Geospatial Data Collection: Population, Landscape and Climate Estimates, Version 3 (PLACE lll), Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC) http://sedac.ciesin.columbia.edu/data/set/nagdc-population-landscape-cli....