Prev Next Category: Envelope Letter from Nielsen 1980-10-24 Mogens Otto Nielsen, Denmark Section: Mail Art Network Sent from: Hjallerup, Denmark Medium: Printed matter, Paper, Marker Category: Letter, Envelope Dimensions (cm): 12.5 x 15.5 Pages: 4 Subject: mogens otto nielsen, atmosphere controlled, mail art, visual poetry, carsten schmidt-olsen