The East of Asia Magazine, Vol. III (1904), pp. 189-190
http://purl.library.uoregon.edu/e-asia/ebooks/reada/hydraulics.pdf
East of Asia Magazine, Vol.IV (1905), pp. 145-161.
http://purl.library.uoregon.edu/e-asia/ebooks/read/guanxian.pdf
Washington, D.C.: U.S. Department of Commerce, 2005.
http://purl.library.uoregon.edu/e-asia/ebooks/read/chinawater2005.pdf
Sacramento: U.S. Geological Survey, 2001.
http://purl.library.uoregon.edu/e-asia/ebooks/read/pp1647.pdf