By the 1950s, "The Times"'s list had become the leading best-seller list for book professionals to monitor, along with that of "Publishers Weekly". In the 1960s and 1970s, shopping-mall chain bookstores B. Dalton, Crown Books, and Waldenbooks came to the forefront with a business model of selling newly published best-sellers with mass-market appeal. They used the best-selling status of titles to market the books and not just as a measure of sales, thus placing increased emphasis on the "New York Times" list for book readers and book sellers.