1. INTRODUCTION

2. METHODS  
2.1. 21 cm Modeling  
2.2. Galaxy Modeling  
2.3. The 21 cm-galaxy cross-spectrum  
2.4. Observational Effects  

3. RESULTS

4. DETECTABILITY  
4.1. S/N Calculations  
4.2. Observational Strategies  
4.3. Combining Modes  
4.4. Sources of Systematic Errors  

5. DISCUSSION  
5.1. Increased Sky Coverage  
5.2. Deeper Observations  

6. CONCLUSION