Filtering by: Date 1960 Remove constraint Date: 1960 Format (Original) Periodicals Remove constraint Format (Original): Periodicals Language Portuguese Remove constraint Language: Portuguese Member of collection ids ssim w9505163c Remove constraint Member of collection ids ssim: w9505163c Subject Centro Regional de Pesquisas Educacionais do Rio Grande do Sul--Periodicals Remove constraint Subject: Centro Regional de Pesquisas Educacionais do Rio Grande do Sul--Periodicals