Stack of books on the color background
Palabras clave
background,
blank,
book,
book,
collection,
colours,
cover,
datum,
document,
education,
expertise,
green,
group,
hardcover,
heap,
image,
information,
learning,
library,
literature,
nobody,
object,
open,
order,
page,
page,
paper,
reading,
research,
row,
school,
stack,
text,
textbook,
textbook,
variation,
view,
white,
wisdom,
gradient
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