Description
A rare ephemeral Spanish edition of a Polish hard science-fiction novel The Invincible (Niezwyciężony), involving artificial swarm intelligence, “necroevolution”, microrobots and smartdust was published in Havana, Cuba.
Thew novel was written by a Polish author and first published in 1964.
We could not find any institutional examples on Worldcat.



![ESPERANTO POETRY: Streĉita kordo [A Taut String].](https://pahor.at/wp-content/uploads/2020/06/65501-265x331.jpg)


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