attempt by a library to provide copies of library materials to patrons rather than the original documents, and during its first year, over 300,000 copies were distributed. During World War II, the Department of Agriculture underwent reorganization to address wartime needs. The library, which had been decentralized since 1920, was consolidated into a central facility under the direction of Department Librarian Ralph R. Shaw. On May 23, 1962, the 100th anniversary of the library's establishment, Secretary of Agriculture Orville Freeman officially designated the library as the National Agricultural Library, making it the third national library in the United States. In 1964, funds were appropriated by Congress to begin planning for a new library facility in Beltsville, Maryland, on the grounds of the Beltsville Agricultural Research Center. Construction on the new facility began in 1965, and it first opened in 1969. In 2000, Secretary of Agriculture Dan Glickman designated the building as the Abraham Lincoln Building. Librarians of the Department of Agriculture Aaron B. Grosh (1867–1869) Stuart Eldridge (1869–1871) John B. Russell (1871–1877) Ernestine H. Stevens (1877–1893) William P. Cutter (1893–1901) Josephine Clark (1901–1907) Claribel Barnett (1907–1940) Ralph R. Shaw (1940–1954) Foster E. Mohrhardt (1954–1968) John Sherrod (1968–1973) Richard Farley (1973–1983) Joseph Howard (1983–1994) Pamela Q.J. Andre (1994–2002) Peter Young (2002–2008) Simon Y. Liu (2010–2014) Paul M. Wester Jr. (2015–) Facilities The main library is housed in the Abraham Lincoln Building, a seventeen-story facility on the grounds of the Henry A. Wallace Beltsville Agricultural Research Center in Beltsville, Maryland. NAL also operates a Washington, D.C., branch known as the DC Reference Center, which is located in the USDA's South Building. Paul L. Byrne Agricultural Teaching and Research Center The Paul L. Byrne Agricultural Teaching and Research Center is located at California State University, Chico and is part of the 800-acre Paul L. Byrne Memorial University Farm. Services PubAg PubAg is search engine that gives the public enhanced access to research published by U.S. Department of Agriculture (USDA) scientists, and also to agriculturally relevant citations from the scientific literature. At its launch on January 13, 2015, PubAg made over 40,000 publications by USDA scientists available, and provided access to an additional 300,000 citations. Ag Data Commons Ag Data Commons is a repository and catalog for scientific datasets that are associated with publications by the USDA's agricultural research service and other institutions. The data included is funded by the USDA, either in whole