The importance of a reliable grouping - Neutron activation analysis (NAA) data of Mycenaean pottery sherds re-evaluated with the Bonn filter method

► Neutron activation analysis data of Mycenaean pottery. ► Comparison of Vienna and Bonn data. ► The same group poatterns are found after scaling of the Vienna data. ► Interlaboratory scaling factors have been determined. ► A local pattern of the area of Tell Djienderis and Oylum Hüyük is given.