Prev Next Medium: Printed matter Pocket Museum 1984-10-00 Mogens Otto Nielsen, Denmark Section: Mail Art Network Sent from: Hjallerup, Denmark Medium: Printed matter Category: Invitation, Envelope Dimensions (cm): 12.5 x 15.5 Pages: 5 Subject: mogens otto nielsen, atmosphere controlled, mail art, visual poetry, pocket museum, pocket object, earth heart