"Aureo Yepez Castillo" sounds like a person's name. Maybe he's an author or educator. "Historia Universal" in Spanish translates to "World History," so this is likely a textbook. "8vo" in some countries refers to the edition or volume of a textbook, but I'm not 100% sure. "PDF" means it's a digital file, and "23 Upd" probably stands for 23 update or the 23rd edition.
"Aureo Yepez Castillo" sounds like a person's name. Maybe he's an author or educator. "Historia Universal" in Spanish translates to "World History," so this is likely a textbook. "8vo" in some countries refers to the edition or volume of a textbook, but I'm not 100% sure. "PDF" means it's a digital file, and "23 Upd" probably stands for 23 update or the 23rd edition.
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