Revenge of the Dead (1983)

(aka) Zeder . Stefano, a young journalist, buys a used typewriter and accidentally sees that some text is still readable on the ribbon. He manages to reconstruct the story of a scientist, Paolo Zeder, who in the 1950's discovered that some types of terrain have the power to revive the dead that are buried in them. Stefano's investigations bring him in contact with a group of renegade scientists that are still making experiments to prove Zeder's theories.