1 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
2 | Assessment of Ivybridge mobile monitoring station and investigation of the water quality of the River Erme and the effect of Ivybridge Sewage Treatment works final effluent |
3 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |