| Reference Number | TPC/5/2/118 |
| Title | Sound and Communication Outlets Grids E-L Level 49.0 |
| Level | Item |
| Date | 30 October 1973 |
| Description | Theatre Projects Consultants Ltd drawing number 904/307 issue 4. Drawn by D C. Original date 23 March 1970. Two copies, one annotated. |
| Extent | 2 drawings |
| Series | Theatre Projects Consultants Ltd Drawings |