Perrone, Charles A.2020-04-301992Perrone, Charles A. 1992. The imperative of invention: Brazilian concrete poetry and intersemiotic creation. Harvard Library Bulletin 3 (2), Summer 1992: 44-53.0017-8136http://nrs.harvard.edu/urn-3:HUL.InstRepos:42663105en-USJournal Article2020-04-30