The 20 volumes are heavily illustrated with color and black-and-white photographs, engravings, and maps, comprising over 7,000 pages of content. Educational Philosophy and Impact
Published by Editorial Mexicana, often under license from Codex. Similar content but with some adaptations for Mexican history and geography. Covers are often green or brown. coleccion el nuevo tesoro de la juventud
La historia de esta obra se remonta a principios del siglo XX en el Reino Unido. The 20 volumes are heavily illustrated with color