| RefNo | Title | Date |
| HB/F/4/86 | International Ballet Competition - Varna \ 1970 \ Clinton Rothwell and Nadya Potts | 1970 |
| HB/F/4/87 | International Ballet Competition - Varna \ 1970 \ Clinton Rothwell and Nadya Potts | 1970 |
| HB/F/4/88 | International Ballet Competition - Varna \ 1970 \ Clinton Rothwell and Nadya Potts | 1970 |