1 INTRODUCTION

2 SAMPLE AND OBSERVATIONS
2.1 Sample Selection
2.2 Observations

3 MASS AND RADIUS DETERMINATION

4 RESULTS
4.1 C18O Mass and Distance
4.2 Comparison with Continuum Masses
4.3 Comparison with Other Linewidths

5 ANALYSIS
5.1 Correlations within the Observables
5.2 Mass and Radius
5.3 FWHM-Mass and FWHM-Radius relationships
5.4 Virial Mass and Gas Surface Density

6 STAR FORMATION EFFICIENCY AND EVOLUTION
6.1 Gas Mass and Luminosity

7 SUMMARY