A learning encyclopedia published in 1975. - Title: 3rd Grade Learning Encyclopedia - Published: 1975 This is a learning guide dictionary for Japanese language, arithmetic, science, social studies, music, physical education, and art. A separate volume is a social studies learning dictionary. In 1975, 50 years ago, I wasn't even born yet, so it seems my 58-year-old sister bought this when she was in 3rd grade. There is some aging and staining on the outer box and paper, but it's clean enough to read without any problems. I guess she didn't study much (lol). Thank you for looking.