Burnham, D.H.; Anderson, Pierce (June 28, 1905). Exhibit B: Report on Improvement of Manila (Report). Government Printing Office. pp.627–635. Archived from the original on December 1, 2020. Retrieved January 31, 2017.
Burnham, D.H.; Anderson, Pierce (June 28, 1905). Exhibit B: Report on Improvement of Manila (Report). Government Printing Office. pp.627–635. Archived from the original on December 1, 2020. Retrieved January 31, 2017.