As demand waned, cheaper reprints appeared with lower-quality paper and fewer color plates. These are less valuable to collectors but still cherished for their content.
es una adaptación en español del New Book of Knowledge , publicada originalmente por Grolier y Editorial Cumbre, que marcó a generaciones con sus 20 tomos llenos de conocimiento, historias y arte. coleccion el nuevo tesoro de la juventud
While the original Tesoro de la Juventud (often associated with W.M. Jackson) dates back to the mid-20th century, the "Nuevo" (New) version was an attempt to modernize the information, layout, and photography for a new generation, roughly spanning the 1970s, 80s, and 90s. As demand waned