21. Reference : CY-1-20-7

Letter from Odense University, Denmark to National Museum

| 1975 | Letter from Odense University, Denmark to National Museum Oct 14,1975 | Letter

22. Reference : CY-1-20-8

Letter to Vance R. Childrens

| 1975 | Letter to Vance R. Childrens (October 1975) | Letter

23. Reference : CY-1-20-10

Correspondence with Suvaporn Viriyaphan

| 1976 | Correspondence with Suvaporn Viriyaphan (10 January1976) | Letter

24. Reference : CY-1-20-11

Letter from Prof. Jose Thiago Cintra

| 1976 | Letter from Prof. Jose Thiago Cintra (24 January 1976) | Letter

25. Reference : CY-1-20-12

Letter from Sara A. Thompson

| 1976 | Letter from Sara A. Thompson (10 May 1976) | Letter

26. Reference : CY-1-20-13

Letter to Sara A. Thompson

| 1976 | Letter to Sara A. Thompson (21 May 1976) | Letter

27. Reference : CY-1-20-14

Letter to Prof. Charles Higham

| 1976 | Letter to Prof. Charles Higham (8 September 1976) | Letter

28. Reference : CY-1-20-15

Letter to Prof. J. Boisselier

| 1976 | Letter to Prof. J. Boisselier (November 1976) | Letter

29. Reference : CY-1-20-16

Letter to the editor of Asian Perspectives

| 1976 | Letter to the editor of Asian Perspectives (4 May 1979) | Letter

30. Reference : CY-1-20-17

Letter from Bennet Bronson

| 1976 | Letter from Bennet Bronson | Letter