Bookstore sales in April 2014 fell 1.3% compared to April 2013, according to preliminary figures from the U.S. Census Bureau.

April 2014 bookstore sales are estimated at $684 million. Sales in the same period last year were $693 million.

Severe winter weather has been blamed for weak retail sales in the first quarter this year.

Estimates reflect sales at all types of participating bookstores, including trade, college, religious and chain stores. A bookstore is defined as any retail establishment with sales comprised of more than 50 percent new books and periodicals, and estimates include sales of all products in these stores.