1. Introduction

2. Instrumentation
2.1. OVRO 40-meter and 31 GHz Receiver
2.2. GBT, 31 GHz Receiver and Continuum Backend

3. Source Lists and Sample Selection

4. Observations
4.1. OVRO Observations
4.2. OVRO Data Reduction
4.3. GBT Observations
4.4. GBT Data Reduction
4.5. The Effect of Finite Source Size
4.6. Confusion
4.7. Source Catalogs

5. Interpretation
5.1. Spectral Index Distribution from GBT, OVRO, and NVSS Data
5.2. 31 GHz Source Counts
5.3. The Effect of Unidentified Sources on CBI Measurements

6. Conclusions