Prev Next Medium: Printed matter Letter from Nielsen 1978-09-20 Mogens Otto Nielsen, Denmark Section: Mail Art Network Sent from: Hjallerup, Denmark Medium: Printed matter, Paper, Marker Category: Letter, Envelope Dimensions (cm): 23 x 32.5 Pages: 4 Subject: mogens otto nielsen, atmosphere controlled, mail art, visual poetry, mr klein, the fa(r)thers