This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country on the URAA date (January 1, 1996 for most countries).
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Captions
Miguel Castro competing in the 1500 metres at the 1936 Berlin Olympics, sourced from 'Los Sports' publication.
Miguel Castro compitiendo en los 1500 metros en los Juegos Olímpicos de Berlín 1936, extraído de la publicación 'Los Sports'.