Wilanfranco Caballero TAYONE และ Davao Oriental State College of Science and Technology. (2014) Baseline Profile of Soil Samples from Upian River Watershed. <i>Walailak Journal of Science and Technology</i>, <i>11</i>(6), .Wilanfranco Caballero TAYONE และ Davao Oriental State College of Science and Technology. "Baseline Profile of Soil Samples from Upian River Watershed". Walailak Journal of Science and Technology 11 (2014):.Wilanfranco Caballero TAYONE และ Davao Oriental State College of Science and Technology. Baseline Profile of Soil Samples from Upian River Watershed. Walailak University:ม.ป.ท. 2014.