A[1] B[2] C[3] D[4] E[5] F[6] G[7]
- ^ Administrative Order No. 1 (February 19, 1968), Title goes here
- ^ DPWC Administrative Order No. 1 (February 19, 1968), Title goes here
- ^ DPWC Administrative Order No. 1 (February 19, 1968), Title goes here
- ^ DPWC Philippines Administrative Order No. 1 (February 19, 1968), Title goes here
- ^ Department of Public Works and Highways Philippines Administrative Order No. 1 (February 19, 1968), Title goes here
- ^ Department of Transportation (Philippines) Administrative Order No. 1 (February 19, 1968), Title goes here
- ^ [[Department of Transportation (Philippines)|]] Administrative Order No. 1 (February 19, 1968), Title goes here