[[WorldCat]] is a global cooperative [[union catalog]] which itemizes the collections of 72,000 libraries in 170 countries and territories. The abbreviations in the box represent the following: [[Virtual International Authority File]] (VIAF); [[Library of Congress Control Number]] (LCCN); [[International Standard Name Identifier]] (ISNI); and [[Integrated Authority File]] (GND), ''Gemeinsame Normdatei'' in German. [[WorldCat]] is a global cooperative [[union catalog]] which itemizes the collections of 72,000 libraries in 170 countries and territories.
