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Published in "Catálogo de exportadores y productores españoles" in 1930

Published in "Guipuzcoa en la mano" in 1958

Published in "Vizcaya y Guipuzcoa en la mano" in 1926

Published in 1924 in the journal "Vida vasca"

Published in 1926 in the journal "Vida vasca"

Published in the book "Industria guipuzcoana de la Cuenca del Deba, 1956 - 1957"

Published in the section of hunting shotguns of "Economía vascongada" in 1956