21. Reference : RS-1-1-3-021

A drawing in ink of fragment of pottery of archaeological site no. 29 Tham Ya Pa Nhae 2

| 1998 | A drawing in ink of fragment of pottery of archaeological site no. 29 Tham Ya Pa Nhae 2 | Drawing

22. Reference : RS-1-1-3-022

An ink drawing of coffins of archaeological site no. 35 Tham Lang Jan 3

| 1998 | An ink drawing of coffins of archaeological site no. 35 Tham Lang Jan 3 | Drawing

23. Reference : RS-1-1-3-023

An ink drawing of rock paintings of archaeological site no. 4 Tham Sri So Pon

| 1998 | An ink drawing of rock paintings of archaeological site no. 4 Tham Sri So Pon | Drawing