Analysis of information sources in references of the Wikipedia article "民都鲁" in Chinese language version.
Realizing that war was imminent, the Brooke Government, under Sir Charles Vyner Brooke, conducted preliminary work to establish airstrips at selected locations throughout the country. These airstrips would be located at Kuching, Oya, Mukah, Bintulu, and Miri. By 1938 work was completed on all the airstrips except Bintulu, which was discontinued in October 1938 due to financial reasons.（英文）
Realizing that war was imminent, the Brooke Government, under Sir Charles Vyner Brooke, conducted preliminary work to establish airstrips at selected locations throughout the country. These airstrips would be located at Kuching, Oya, Mukah, Bintulu, and Miri. By 1938 work was completed on all the airstrips except Bintulu, which was discontinued in October 1938 due to financial reasons.（英文）
