1. Introduction

2. Data
2.1. Calibration Sample
2.2. Validation Sample

3. Definition of the Spectral Indices

4. The Spectral Indices Method
4.1. Normalization
4.2. Measurements of the Equivalent Widths of the Indices
4.3. Construction of the Calibrations
4.4. Determination of the Atmospheric Parameters

5. Results and Discussion
5.1. Application of the Method to the Calibration Sample
5.2. Application of the Method to the MARVELS Validation Sample

6. Conclusions