Here are six 1970-1972 soft cover books in mint condition. They cover everything: rare, scarce, embossing errors, Hemingray, porcelain insulators and choice insulators and all with 1970 prices. You will find answers to questions in those 1970 books that collectors are asking on Icon almost every day. It's amazing the information that has been around for years and these older books are great sources of information and cheap!. All six books for $20 plus shipping. meadia mail is cheap!