El seguro obrero : Conferencias dadas en el curso de extensión universitaria del Colegio nacional Mariano Moreno en julio y agosto de 1911 / por el Doctor Mariano R. Castex.

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Castex, Mariano Rafael, 1886-1968.

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El seguro obrero : Conferencias dadas en el curso de extensión universitaria del Colegio nacional Mariano Moreno en julio y agosto de 1911 / por el Doctor Mariano R. Castex.