Note: The series consists of 1,955 facscimile reprints of Prisma-pockets that have been published since 1951. Earliest mention of this series found is 2006-10-00 (see this Trouw article). The information in this article states 'the titles are digitized, and when ordered distributed in minimal amounts'. This provides evidence this publication series is POD. Based on this information, a publication date of 2011-04-00 must be met with caution, as POD publication dates are date of first appearance of this publication.