Benjamin Heber Johnson <br/><br/>
Escaping the Dark, Gray City  Fear and Hope in Progressive-Era Conservation 

 -  Yale University Press  2017 
<br/><br/><label>ISBN: </label>9780300115505 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Environmental Conservation & Protection<br/>Conservation of natural resources--Political aspects--United States--History--20th century.,Environmentalism--United States--History--20th century.,Nature conservation--Political aspects--United States--History--20th century.,Progressivism (United States politics)--History--20th century.<br/>NATURE