Distribution of the Sands graphite on stone paper, 21×29,5 cm, 2016 Frottages of the Samples Thin sectionsEvaluation of the Fine Dust Museo di Palazzo Poggi, BolognaSassi/Stones. Reading the rockFrottages Palazzetto Tito, Venice mariateresa sartori2017-02-19T17:43:05+00:00