HELSINKI, 2016-Sep-14 — /EPR Retail News/ — According to Media Audit Finland (MAF) published today (13.9.2016), the K-Group's customer magazine Pirkka is Finland's most read customer magazine with a readership of 2.36 million. "The huge readership is definitely the best prize for all of us who contribute to the making of Pirkka. We thank our customers for…