7 articles in this issue
Roberval Zen,Gérson Tontini
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