Home › Authors › Thawin Yūyen. 👤 Thawin Yūyen. 1 book Books by Thawin Yūyen. Sarup hētkān samkhan samai R Sarup hētkān samkhan samai Ratchakān thī 4-5, Phō̜. Sō̜. 2394 thưng Phō̜. Sō̜. 2453 1968