Officially

From the publisher, in order, with its history intact.

Revision history

INS fortalece vigilancia de la tos ferina y resistencia a los macrólidos en el Perú — 2 versions recorded. Nothing here has been overwritten.

  1. Version 2 imported change current
    INS fortalece vigilancia de la tos ferina y resistencia a los macrólidos en el Perú
  2. Version 1 original
    INS fortalece vigilancia de la tos ferina y resistencia a los macrólidos en el Perú

Officially records where a publication came from, not whether it is true. Imported records are reproduced from an organization's own official source.