7 articles in this issue
Roberval Zen,Gérson Tontini
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Heloisa Márcia Pires,Elton Fernandes
Manfredo Krieck,Gérson Tontini
Waldir Rechziegel,Rosangela Maria Vanalle
Felipe Araújo Calarge,Abner Guil Maia,paulo Corrêia Lima
Sergio Eduardo Golvêia da Costa
Pedro Paulo H. Wilhelm,Valdomiro Froehlich Junior,Clodoaldo Kamke