I have already noticed the same tendency – the reconstitution of an archives starting from the records preserved by the interviewees – in the research carried out for his graduation thesis, La prima esperienza di distribuzione del metano per uso domestico: SAMUR srl, 1948-1985 (academic year 2004-2005, University of Milan), supervisor Professor Germano Maifreda, co-examiner Professor Roberta Garruccio.