Pongtorn Sungpuag. 1993. Development of database for vitamin A and beta carotene in Thai foods and establishment of simplified dietary assessment of retinal equivalent consumption. Faculty of Graduate Studies, Mahidol University;
Pongtorn Sungpuag. (1993) Development of database for vitamin A and beta carotene in Thai foods and establishment of simplified dietary assessment of retinal equivalent consumption . Mahidol University/Bangkok.
Pongtorn Sungpuag. Development of database for vitamin A and beta carotene in Thai foods and establishment of simplified dietary assessment of retinal equivalent consumption. . Bangkok:Mahidol University, 1993.
Pongtorn Sungpuag. (1993) Development of database for vitamin A and beta carotene in Thai foods and establishment of simplified dietary assessment of retinal equivalent consumption . Mahidol University/Bangkok.