Parameters of neutron resonances play a significant role both in basic physics, but even more so for applications. For the understanding of astrophysical processes neutron cross sections in particular at low energies are indispensable. For practical applications precise neutron data are becoming more important be it for the design of new nuclear reactors, for waste transmutation or the newly considered Thorium – Uranium cycle. This volume provides an update of data published in volumes 16B. Since their publication several years have elapsed and new data have become available. Their quality and precision has been considerably improved by the operation of new neutron spectrometers, in particular GELINA, a time-of-flight facility to which a whole chapter is devoted. The data are presented in the same format as in the previous volumes. In addition to the neutron resonance parameters the parameters of the subsequent gamma-rays are also included. Since the total amount of data is very large only the parameters of the most important resonances (at low energies) could be included in the printed version whereas the data for resonances at higher energies are contained on the CD-ROM as Supplement. Again a considerable effort was made in comparing data from different sources in order to establish ‘best values’, one of the main characteristics of Landoldt- Börnstein publications.