Sound (Italian), b&w, 11+ min. On the expansion of the zinc mining industry in Val Seriana, in the province of Bergamo, with the help of the Marshall Plan. Shows men mining and illustrates the electrolytic smelting process. 1948-1953. Directed by Joe Falletta. Photography by Massimo Sallusti, narrated by Stephen L. James. Producer not named. Probably sponsored by ECA or MSA Italy.