I wonder why Wikidata includes/filters in this kind of entries:
Foundations of Astrophysics Barbara Ryden Bradley M. Peterson. 596 pp. Addison-Wesley, San Francisco, 2009. Price: $137.33 (hardcover). ISBN 978-0-321-59558-4 (Q105030571)
German Reich and Protectorate of Bohemia and Moravia September 1939–September 1941 (Q104958086)
Do they imply mistakes somewhere?