Marvin VALENTIN และผู้แต่งคนอื่นๆ. (2015) DESIGN, FABRICATION AND PERFORMANCE EVALUATION OF A POTATO (SOLANUM TUBEROSUM L.) GRADER FOR VILLAGE-LEVEL OPERATIONS. Thai Society of Agricultural Engineering:ม.ป.ท.Marvin VALENTIN และผู้แต่งคนอื่นๆ. 2015. DESIGN, FABRICATION AND PERFORMANCE EVALUATION OF A POTATO (SOLANUM TUBEROSUM L.) GRADER FOR VILLAGE-LEVEL OPERATIONS. ม.ป.ท.:Thai Society of Agricultural Engineering;Marvin VALENTIN และผู้แต่งคนอื่นๆ. DESIGN, FABRICATION AND PERFORMANCE EVALUATION OF A POTATO (SOLANUM TUBEROSUM L.) GRADER FOR VILLAGE-LEVEL OPERATIONS. ม.ป.ท.:Thai Society of Agricultural Engineering, 2015. Print.