1. Introduction and the GMRT Radio Halo Survey

2. The Cluster Sample

3. Radio Observations and Data Reduction

4. Undetections and Upper Limits  
4.1. The Procedure  
4.2. The Results  

5. Cluster Scale Radio Emission: New Detections and Candidates  
5.1. The Giant Radio Halo in A 697  
5.2. The Core–Halo in Z 7160  
5.3. Peripheral Diffuse Radio Emission in A 781  
5.4. A 1682 – A Giant Radio Halo and Two Relics?  
5.5. Candidate Extended Emission at the Centre of Z 2661  
5.6. Notes on the Clusters with VLA Archive Data  

6. Discussion of the GMRT Radio Halo Survey Observational Results  
6.1. Cluster Centres  
6.2. Cluster Outskirts. Radio Relics and Candidates  
6.3. Information on the Cluster Dynamics from X-Ray Data  
6.4. Fraction of Clusters Hosting a Radio Halo  

7. Summary and Conclusions