> Aerial photography was used again in the 1966 by-census and the next decennial census in 1971. In addition to the astonishing visual impact of surviving photo

> Aerial photography was used again in the 1966 by-census and the next decennial census in 1971. In addition to the astonishing visual impact of surviving photographs, Of course, the article does not actually include any of these astonishing photographs, and I can't find them online either. But this (2017) NYT story has some. https://www.nytimes.com/2017/01/23/world/asia/china-tanka-river-people-datang.html https://www.nytimes.com/2017/01/23/world/asia/china-tanka-ri...