239 Paper Digital

__* 239 Paper Digital 종이 디지털 !!
↗Paper 40% ↘Digital ↗Paper book 40% ↘Digital book 60%
↗종이 40% ↘디지털 60% ↗종이책 40% ↘전자책 60%
__* 239 Paper Digital 종이 디지털 !!
# E