Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889, 1991, 2010 and other years
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The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on...
本批拍摄视点（viewpoint）于1889年由斯坦顿（Stanton）首次拍摄，后分别于约1991年、2010年及其他部分年份进行重拍。该组照片聚焦于……
