Anniversary history
| Title | Date of publication |
|---|---|
| DPRI 70 years' history | November 1, 2021 |
| DPRI 60 years' history | November 1, 2011 |
| DPRI 50 years' history | April 1,2001 |
| DPRI 45 years' history | November 1,1996 |
| DPRI 40 years' history | October 31,1991 |
| DPRI 35 years' history | December 6,1986 |
| DPRI 30 years' history | October 31,1981 |
| DPRI 25 years' history | October 30,1976 |
| DPRI 20 years' history | November 24,1971 |
| DPRI 15 years' history | October 31,1966 |
| DPRI 10 years' history | November 25,1961 |
