The large handbooks in physics, chemistry and other disciplines contain data needed every day as well as additional equally important data needed only at longer time intervals. This volume contains the basic data and a full list of contents of the respective Landolt-Bornstein volumes from which the data were drawn. Hence the user is informed what additional information is held at his disposal in the more complete handbooks, i.e. this volume provides a bridge from the laboratory to the library. It contains data and further information about semiconducting substances.