La Unión District is one of nine districts of the province Tarma in Peru. Instituto Nacional de Estadística e Informática. Banco de Información Distrital . Retrieved April 11, 2008. It is bordered on the north by the districts of Palcamayo and San Pedro de Cajas; on the south by the district of Tarma; on the east by the district of Acobamba; and on the west by the Central Railroad of Cerro de Pasco.
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