Original sentence: His last exhibition was a retrospective of his Works in the Galeria Ibero-Americana de Arte, in São Paulo, between November 17th and December 15th, 1983 – at which 165 of his works were presented, ranging over the period 1961 and 1983,.Mario Guimarães Ferri (São José dos Campos, SP, 1918 — São Paulo, SP, 15 june 1985) was a Professor at the Universidade de São Paulo (USP)
Edited sentence: His last exhibition was a retrospective of his Works in the Galeria Ibero-Americana de Arte, in São Paulo, between November 17 and December 15, 1983 – at which 165 of his works were presented, ranging over the period 1961 and 1983,.Mario Guimarães Ferri (São José dos Campos, SP, 1918 — São Paulo, SP, 15 June 1985) was a Professor at the Universidade de São Paulo (USP)