At the Upper Level gallery, Libro Internacional, a three-volume project by Edgardo Antonio Vigo (1925-1997),a prolific Argentinean pioneer of conceptual and mail-art. Vigo edited and compiled an edition of folders containing projects mailed by international artsits, including Hervé Fischer, Ulises Carrión, Genesis P. Orridge, Steve Hitchcook, Luis Benedit. Following Vigo’s impressive retrospective at the Museum of Modern Art of Buenos Aires in 2016, this intimate show allows visitors to handle and browse the editions.