Sawyer, S. R., A High-Resolution CCD Spectroscopic Survey of Low-Albedo Main Belt Asteroids, thèse de doctorat, The University of Texas -LRB- 1991 -RRB-.
S.R. Sawyer A High-Resolution CCD Spectroscopic Survey of Low-Albedo Main Belt Asteroids, thèse de doctorat, The University of Texas -LRB- 1991 -RRB-.