Vintage 1978 Carl Sandburg's Abraham Lincoln The Prairie & War Years 3 Book Set

Vintage 1978 Carl Sandburg's Abraham Lincoln The Prairie & War Years 3 Book Set These three books are in good condition for their age but do have yellowed pages. The carboard box holding the books is torn in one corner. Box set measures 7.25" by 4.25" by 2.5", so cool!