A Oposição Operária 1920-1921
| Publisher | Afrontamento |
| Translated by | V. T. |
| Cover/Jacket Design by | João B. |
| Printed and Bound by | Gráfica Firmeza |
| Format | Paperback |
| Language | Portuguese |
| Location | Portugal |
| This Edition Published | 1977 |
| Pages / Font | 126 pages |
| Notes | 2.ª Edição |
Added by Xavier.Rafael