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Dyfyniad Arddull ChicagoPre-feasibility Study of Davao-Calinan-Bukidnon Road. Manila: Planning and Project Development Office, 1972.
Dyfyniad MLAPre-feasibility Study of Davao-Calinan-Bukidnon Road. Planning and Project Development Office, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.