Council, in response, overwhelmingly approved her appointment and passed a resolution not to censor books purchased by the library. By the 1970s, the Central Library had again become overloaded and was unequipped to handle emerging technology. (This was partly a result of the federal Library Services and Construction Act, which had enabled the addition of an unexpected number of volumes to the collection in a relatively short period of time.) In 1972, the City selected a site at Young and Ervay across from the Dallas City Hall for a new central library facility. In 1982, the technologically sophisticated structure opened its doors. It was one of the first libraries in the nation to include an Online Public Access Catalog (OPAC) and state-of-the-art audiovisual capabilities. It was renamed the J. Erik Jonsson Central Library in 1986 in honor of the former mayor who played a large role in the library system's development. By the 2000s, the system had 27 branch locations with over 2.5 million volumes, including books, magazines, videos, and cassettes. The system currently attracts 2.8 million visitors per year and has 540,000 cardholders who check out more than 3.8 million books and other materials per year. The Library also operates a "Library on Wheels" Mobile Learning Center to service Dallas communities. Historic documents The Dallas Public Library is home to a copy of Shakespeare's First Folio, the only copy in a US public library outside of New England. It was purchased by the Dallas Shakespeare Club in 1984 at a cost of $275,000 and was gifted to the Library in 1986. It is displayed on the 7th floor. A Dunlap Broadside copy of the Declaration of Independence is also housed on the 7th floor. Printed by John Dunlap of Philadelphia, it is only one of twenty-five known to survive. This is the only copy west of the Mississippi, and one of only 3 displayed by a public library. It was purchased by a number of individuals for $500,000 and given to the city. Branches The library operates 27 branch locations throughout the city, and an 8-story main branch, the J. Erik Jonsson Central Library, in the Government District of downtown. It also operates the Bookmarks Children's Library located in NorthPark Center. Arcadia Park Branch Library in West Dallas Audelia Road Branch Library in Lake Highlands Bachman Lake Branch Library Dallas West Branch Library in West Dallas Forest Green Branch