1. INTRODUCTION

2. OBSERVATIONS AND ANALYSIS
2.1. IRAC Observations
2.2. Deblending
2.3. Host-Galaxy Photometry
2.4. Mass Conversion

3. RESULTS
3.2. Dark Bursts and the Role of Extinction
3.3. Comparison to Field-Selected Star-Forming Galaxies
3.4. The Threshold Mass and Metallicity for GRB Production
3.5. Peering Below the Surface: The Fraction of Star Formation in IRAC-Undetected Galaxies
3.6. Correcting the GRB-Inferred Cosmic Star-Formation Rate History

4. DISCUSSION AND CONCLUSIONS