Six hundred binders hold plastic sleeves filled with studio waste in a huge installation of books and other material created by Dieter Roth and his son and collaborator, Bjorn Roth currently at Hauser & Wirth Gallery in Chelsea. Every piece of trash less than 5mm thick found its way into a binder in the years 1975-76, resulting in a portrait of the artist told through postcards, cigarette butts, packaging and more. ‘The worse it looks, the better,’ Roth noted on one binder. (On view through July 29th).