American Environmental History BibliographyDan Flores and Dennis Williams. Not comprehensive, but a large number of entries, divided by: Native Americans and American Nature, European Antecedents, American Exploration and Natural History, the Romantic Age and the Cult of Nature, Environment and the Frontier, Regional Ecological Histories, the Progressive Conservation Movement, Conservation in the 20s and New Deal, Parks and Forests, Urban and Political Issues Since WWII, Ecology (the science) and Environmentalism (the social movement),