Photo: Felix Nic. License: All Rights Reserved.

"Usted precisa una buena línea" ("You need a good line"). Geomundo magazine, 1977.

Magazine ad for the Rotring Micronorm, a pen for technical drawing.

Photo: Felix Nic. License: All Rights Reserved.

"Es una gran línea" ("It's a great line"). Geomundo magazine, 1977 (detail).