Easy Concert Pieces Guitar, Volume 1 Book with Online AudioHal Leonard Corp., Peter Ansorge, Martin Hegel, Bruno Szordikowski · First published 2023Open the Tome
Easy Concert Pieces for Guitar - Volume 2 Book with Online MaterialPeter Ansorge, Martin Hegel, Bruno Szordikowski · First published 2022Open the Tome
Integrative Transformation von Geschäftsmodellen von kleinen und mittleren Unternehmen unter disruptiven MarktbedingungenPeter C. Ansorge · First published 2011Open the Tome
