Yan Preston, ‘Map for the ‘Trial Point System”, Digital image., May 2011. Edited&downloaded from Google Earth. 100 km intervals along the river from Yibin and Chongqing.
Map for the ‘Trial Point System’
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Yan Preston, ‘Map for the ‘Trial Point System”, Digital image., May 2011. Edited&downloaded from Google Earth. 100 km intervals along the river from Yibin and Chongqing.