This "Supplement to Genealogies in the Library of Congress" lists all genealogies in the Library of Congress that were catalogued between 1972 and 1976, showing acquisitions made by the Library in the five years since publication of the original two-volume Bibliography. Arranged alphabetically by family name, it adds several thousand works to the canon, clinching the Bibliography's position as the premier finding-aid in genealogy.

Containing authentic biographies of New Yorkers who are leaders and representatives in various departments of worthy human achievement including sketches of every army and navy officer born in or appointed from New York and now serving, of all the congressmen from the state, all state senators and judges, and all ambassadors, ministers and consuls appointed from New York.