- Circular letter (Number 15, July 10, 1946)1
- Circular letter (Number 15, March 1, 1946)1
- Circular letter (Number 15, May 31, 1945)1
- Circular letter (Number 15, May 8, 1945)1
- Circular letter (Number 16, March 12, 1946)1
- Circular letter (Number 16, May 11, 1945)1
- Circular letter (Number 16, May 31, 1945)1
- Circular letter (Number 17, February 17, 1945)1
- Circular letter (Number 17, June 4, 1945)1
- Circular letter (Number 17, March 18, 1946)1
- Circular letter (Number 17, May 22, 1945)1
- Circular letter (Number 18, June 6, 1945)1
- Circular letter (Number 18, March 23, 1946)1
- Circular letter (Number 18, May 27, 1945)1
- Circular letter (Number 19, June 6, 1945)2
- Circular letter (Number 19, March 30, 1946)1
- Circular letter (Number 2, February 11, 1946)1
- Circular letter (Number 2, January 11, 1945)1
- Circular letter (Number 2, January 11, 1946)1
- Circular letter (Number 2, January 2, 1945)1