Following the introduction which gives an overall picture of developments in the Library of Congress, the chapters deal specifically with the: (1) processing department, (2) legislative reference service, (3) reference department, (4) law library, (5) administrative department and (6) copyright office. The 14 appendices show, in a figurative sense, the growth of the Library of Congress collections and many of its operations. The index is a merged listing by subject and author in alphabetical order. (NH)