Report on the lands of the arid region of the United States, with a more detailed account of the lands of Utah

John Wesley Powell

《Report on the lands of the arid region of the United States, with a more detailed account of the lands of Utah》，John Wesley Powell。这是一部关于历史、科学、艺术的公版作品，适合在安静的片刻里慢慢读下去。