Reference List for the UBV MEAN ASTEROID COLORS bundle
======================================================

Lukac, M. R., and R. J. Miller. List of Active      
        Professional Observatories. United States Naval Observatory Circular  
        No. 178. Washington DC, 2000.                                         
        

Tedesco, E.F., J.G. Williams, D.L. Matson, G.J.     
        Veeder, J.C. Gradie, and L.A. Lebofsky, A Three-Parameter Asteroid    
        Taxonomy, Astron. J. 97, 580-606, 1989.