Supasansatorn, A. , Chumpol , S. , Ritthitham, K. , Jaroenkunathum, W. and Phumiamorn, S. 2021. Determination of Degree Adsorption of Diphtheria and Tetanus Toxoid in Vaccine by Using Sandwich ELISA. Thai Food and Drug Journal. 28, 3 (Oct. 2021), 22–33.