Children's "Pictorial Encyclopedia of American History", Books 1-16, Hardcovers cheapest 1962 edition

Children's "Pictorial Encyclopedia of American History", Books 1-16, Hardcovers 1962 edition. Complete set books 1 through 16. Books have a cheapest little cover wear mainly along the top & bottom edges, and outer binding. but over all these are in very good vintage condition!! Inside pages are like new! I didn't see any writing in.