This article relies largely or entirely on a single source . Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources:  "Sindicato de Trabajadores Ferrocarrileros de la República Mexicana"  –  news · newspapers · books · scholar · JSTOR (August 2025)

The Union of Railroad Workers of the Mexican Republic (Spanish : Sindicato de Trabajadores Ferrocarrileros de la Republica Mexicana, or STFRM) ^[1] is labor union that represents railroad workers in Mexico. It was founded in 1933. It became affiliated with the Confederation of Mexican Workers (CTM) in 1936. It is enrolled in the PRI.

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