Over the last few decades, much interest has centred on the use of spectrographic analyses of Bronze Age objects as a means of classification to produce groups for subsequent archaeological assessment. Separate research teams have used differing systems to classify their results, the most comprehensive work being that of the Stuttgart school, published in two volumes, SAM I and SAM 2 by Junghans, Sangmeister and Schroder (1960; 1968).
