Title: ¡Madrilenos Antifascistas Todos!
Title translation: "People of Madrid, All Antifascists!"
Author/Publisher Group: Partido Comunista de España (Sector Este) / Célula 51
Place of Publication: Madrid
Publication Date: 1937
Label/Document Translation:

"[On] the 18th of July 1936, the union of the proletariat masses overpowered the fascist uprising in Madrid and part of Spain. Today, the 18th of July 1937, we must unite strongly, with our socialist brothers, in order to deliver our cry of VICTORY, which we will achieve with union, to the entire world. Long live the heroic popular Army and the glorious Spanish Air Force! Long live the Single Party of the Proletariat!"