 The XIII Congress of the CTC, in November 1973, save special significance for Los Trabajadores, because it was approved the resolution endorsing the need for its existence.For this called Lázaro Peña from his starring role in the revitalization of unions, coinciding also with the run-up to the great event of the Cuban proletariat.Although in the beginning was distributed free in meetings of workers and through the workplace, in November 1974 began the sale of Los Trabajadores, which was selected the populous corner of L and 23, in El Vedado.