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* {{cite news |url=http://seedmagazine.com/content/article/the_environmental_revival/ |title=Which modern enviro concepts are throwbacks to the past? Four experts discuss the technologies, laws, and states of mind that have their roots in the first wave of the environmental movement. |work=[[Seed (magazine)|Seed]] |year=2009}}
* [https://omeka.binghamton.edu/omeka/items/show/1179 Interview with Denis Hayes] by Stephen McKiernan, Binghamton University Libraries Center for the Study of the 1960s
 
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