Photoelectron spectroscopy has matured considerably during the last decades. The experimental techniques were improved impressively, and a deeper theoretical insight into the underlying mechanisms of photoemission could be achieved. The present volume 23C1 is a critical and as comprehensive as possible tabulation of data on mainly bulk electronic structure of noble metals, noble metal halides and nonmagnetic transition metals obtained by electron and photon spectroscopies. Besides the photoelectron results and calculated dispersion curves, also a limited set of data like lattice constants and work functions is given which may be useful in the context of band structure information. No such collection of photoelectron spectra and related data exists at present. - Tables of frequently used symbols and abbreviations are given in a general introduction where also definitions of the quantities and some historical remarks are included. - An Index of substances for all subvolumes of III/23 may serve as a tool to easily find the data the user is interested in.