Aerarunchot, S., Hathaidechadussadee, P., Uasuwan, P. and Namchaitaharn, S. 2020. Air Bubble Formation in Alginate Impression Generated by Hand Mixing, Invented Semi-Automatic Machine and Automatic Centrifuge Machine. Khon Kaen University Dental Journal. 23, 2 (Aug. 2020), 50–56.