exercise book
学習帳
notebook
ruled paper
graph paper
copybook
examination book
laboratory notebook
https://source.unsplash.com/featured/?exercise-book#.png
/suto3/google.iconexercise book
/suto3/Google画像検索.iconexercise book
/suto3/Google定義検索.icon exercise book
/suto3/wikipedia.iconexercise book
/suto3/weblio.icon exercise book
/suto3/kotobank.icon exercise book
/suto3/jisho.icon exercise book