Deep hubble space telescope observations of blue star clusters in NGC 3597

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