1 | A report on the investigation of the Taff litter problem |
2 | The investigation of the Taff litter problem : report no. PL/EAE/89/2 |
3 | A litter assessment of two major tributaries of the Taff, the Cynon and the Rhondda : surveyed March - April 1990 |
4 | Riverside litter : results of the 1990 campaign and a strategy for the future |