Source : George Perkins Marsh (1864). “Man and Nature: Or, Physical Geography as Modified by Human Action”, p.109, New York : C. Scribner
George Perkins Marsh#Science Quotes #Together Quotes #Invisible Quotes
Source : "There Is Only One Issue In America" by Steven Van Zandt, www.huffingtonpost.com. December 10, 2011.
Source : Bill Brandt (1993). “Bill Brandt: Selected Texts & Bibliography”, MacMillan Publishing Company
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