The book "Copyright Renewals in the United States, January-June 1951" is one source that contains information on copyright renewals of works that were important to the American cultural heritage of the time. This publication collected data on works for which copyright renewals were requested between January and June 1951. The authors of this work are the staff of the Library of Congress and the United States Copyright Office. This book is an essential reference for the study of copyright law, the legal protection of works, and the history of the book business in the United States in the early 1950s.