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Surapol Sanguankeol. 1989. A slope failure investigation of the embankment on the colluvial soil between KM. 12.658 and 12.765 Prachinburi to Khao Yai highway. Graduate School, Chulalongkorn University;
Surapol Sanguankeol. (1989) A slope failure investigation of the embankment on the colluvial soil between KM. 12.658 and 12.765 Prachinburi to Khao Yai highway . Chulalongkorn University/Bangkok.
Surapol Sanguankeol. A slope failure investigation of the embankment on the colluvial soil between KM. 12.658 and 12.765 Prachinburi to Khao Yai highway. . Bangkok:Chulalongkorn University, 1989.
Surapol Sanguankeol. (1989) A slope failure investigation of the embankment on the colluvial soil between KM. 12.658 and 12.765 Prachinburi to Khao Yai highway . Chulalongkorn University/Bangkok.