Vintage Set of 4 Paperback Books Erma Bombeck 1970s Funny Humorous

Includes the following 4 books: At Wit's End - 1967 Just Wait Till You Have Children of Your Own! - 1971 The Grass is Always Greener Over the Septic Tank - 1976 If Life is a Bowl of Cherries What am I Doing in the Pits? - 1978 In fair vintage condition. Some of the pages are darkened and pulling away from the spine.