The works of Gary Macy and Miri Rubin on the Eucharist and of Henry Ansgar Kelly on Baptism come to mind. The tract on the sacraments by Hugh of St. Victor was published in translation by the Medieval Academy several years ago. The literature on penance is copious, including work by T. Tentler, A. Frantzen & Michaud-Quantin. On Matrimony, see J. Brundage & (on the very legal side) R. Helmholz. For the others, I would start with the appropriate articles in the New Catholic encyclopedia, my all-time favorite source of ecclesiastical information. tom izbicki %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%