"Gateway to knowledge."; "Library of Congress."; "Library of Congress."; "Libraries--Washington (D. C.)", "Library resources--Washington (D. C.)"; "Library of Congress."; "2009"; "

Pamphlet.

"; ""; "P14998"; "pec"; "Library of Congress.", "Libraries--Washington (D. C.)", "Library resources--Washington (D. C.)"; "14256"; .