WFPC2 observations of compact star cluster nuclei in low-luminosity spiral galaxies

Lynn D. Matthews, John S. Gallagher, John E. Krist, Alan M. Watson, Christopher J. Burrows, Richard E. Griffiths, J. Jeff Hester, John T. Trauger, Gilda E. Ballester, John T. Clarke, David Crisp, Robin W. Evans, John G. Hoessel, Jon A. Holtzman, Jeremy R. Mould, Paul A. Scowen, Karl R. Stapelfeldt, James A. Westphal