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Angela Ruiz Robles (March 28, 1895 Villamanín, Leon - October 27, 1975, Ferrol, A Coruña) was a Spanish teacher, writer, pioneer and inventor of the mechanical precursor to the electronic book. In 1949, Ruiz was awarded Spanish patent 190,698 for the "Mechanical Encyclopedia" (Spanish: la Enciclopedia Mecánica).

https://en.wikipedia.org/wiki/%C3%81ngela_Ruiz_Robles

https://es.wikipedia.org/wiki/%C3%81ngela_Ruiz_Robles
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