of the Census 1905

of the Census, United States Bureau. 1905. Census of the Philippine islands, taken under the direction of the Philippine commission in the year 1903 (Vol. II: Population). Washington, DC: United States Bureau of the Census.

https://archive.org/details/censusphilippin01ganngoog/mode/1up

@techreport{censusofficephilippineislands1903,
  address   = {Washington, DC},
  author    = {of the Census, United States Bureau},
  publisher = {United States Bureau of the Census},
  title     = {Census of the Philippine islands, taken under the direction of the Philippine commission in the year 1903 (Vol. II: Population)},
  url       = {https://archive.org/details/censusphilippin01ganngoog/mode/1up},
  year      = {1905}
}