Over the concluding decades of the twentieth century, the historic preservation community increasingly turned its attention to modern buildings, including bungalows from the 1930s, gas stations and diners from the 1940s, and office buildings and architectural homes from the 1950s. Conservation efforts, however, were often hampered by a lack of technical information about the products used in these structures, and to fill this gap Twentieth-Century Building Materials was developed by the U.S. Department of the Interior’s National Park Service and first published in 1995. Now, this invaluable guide is being reissued—with a new preface by the book’s original editor. With more than 250 illustrations, including a full-color photographic essay, the volume remains an indispensable reference on the history and conservation of modern building materials. Thirty-seven essays written by leading experts offer insights into the history, manufacturing processes, and uses of a wide range of materials, including glass block, aluminum, plywood, linoleum, and gypsum board. Readers will also learn about how these materials perform over time and discover valuable conservation and repair techniques. Bibliographies and sources for further research complete the volume. The book is intended for a wide range of conservation professionals including architects, engineers, conservators, and material scientists engaged in the conservation of modern buildings, as well as scholars in related disciplines.

George C. Marshall was an American military leader, Chief of Staff of the Army, Secretary of State, and the third Secretary of Defense. Once noted as the "organizer of victory" by Winston Churchill for his leadership of the Allied victory in World War II, Marshall served as the United States Army Chief of Staff during the war and as the chief military adviser to President Franklin D. Roosevelt. As Secretary of State, his name was given to the Marshall Plan, for which he was awarded the Nobel Peace Prize in 1953. He drafted this manuscript while he was in Washington, D.C., between 1919 and 1924 as aide-de-camp to General of the Armies John J. Pershing. However, given the growing bitterness of the "memoirs wars" of the period he decided against publication, and the draft sat unused until the 1970s when Marshall's step-daughter and her husband decided to publish it.

In this insightful book you will discover the range wars of the new information age, which is today's battles dealing with intellectual property. Intellectual property rights marks the ground rules for information in today's society, including today's policies that are unbalanced and unspupported by any evidence. The public domain is vital to innovation as well as culture in the realm of material that is protected by property rights.

Essay by Robert Storr. Foreword by Glenn D. Lowry.