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* [[Environmental history of the United States]]
== Bibliography ==
*''The Wisdom of Aldo Leopold'' (Fall 1961) Wisconsin Academy Review Volume 8, Number 4<ref>https://digital.library.wisc.edu/1711.dl/Z75MRIS26ZBBX8O</ref>
*''Philanthropy in the Shaping of American Higher Education'' (1965). Co-authored with [[Merle Curti]]
*[https://books.google.com/books/about/Wilderness_and_the_American_Mind.html?id=q4IxNWXBqOsC ''Wilderness and the American Mind''] (1967).<ref>{{cite book |title=Wilderness and the American Mind |year=2001 |publisher=Yale University Press; 4th edition (September 1, 2001) |isbn=978-0-300-09122-9 |url-access=registration |url=https://archive.org/details/wildernessameric00nash_0 }}</ref>
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