European Plain some 10,000 years ago, when the ice sheets of the lastglacialperiod retreated. Homans, George Caspar. Coming to My Senses: The Autobiography
Thompson. Vegetation and Climate Change in Eastern North America Since the LastGlacial Maximum. Ecology. 1991, 72 (6): 2038–56. JSTOR 1941558. doi:10.2307/1941558