The innovative team of researchers headed by Carlo Maurilio Lerici and founded in 1947, originally based in Milan and now based in Rome, to carry out noninvasive analysis of archaeological sites. The work comprised both geophysical survey and the use of periscopes to penetrate Etruscan tombs. The most notable location of this work was in Tarquinia.
Historical Dictionary of the Etruscans. Simon K. F. Stoddart.