Prev Next Category: Envelope Invitation from Mercado 1981-03-03 Santiago Mercado, Spain Section: Mail Art Network Sent from: Madrid, Spain Medium: Printed matter Category: Letter, CFP, Envelope Dimensions (cm): 21.5 x 15.7 Pages: 2 Notes: "Art in The Street" Subject: santiago mercado, art in the street, action, appearance, disappearance