Philippines (Commonwealth). Bureau of Public Works. (1940). Official copy of the traffic rules and regulations on national roads of the Philippines. [s.n.
Chicago-viite (17. p.)Philippines (Commonwealth). Bureau of Public Works. Official Copy of the Traffic Rules and Regulations on National Roads of the Philippines. Manila: [s.n, 1940.
MLA-viite (9. p.)Philippines (Commonwealth). Bureau of Public Works. Official Copy of the Traffic Rules and Regulations on National Roads of the Philippines. [s.n, 1940.
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