Find in worldcat 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 . Twentieth century building materials history and conservation edited with a new preface by thomas c jester 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 us department of the interiors national park service and first published in 1995 now this invaluable guide is being reissued with a new preface by the books original editor. 2015 twentieth century building materials history and conservation journal of the institute of conservation vol 38 no 2 pp 200 201. Twentieth century building materials history and conservation thomas c jester michael a tomlan getty conservation institute a guide to the materials used in architecture during the past century as well as tips on building repair and restoration with more than 200 illustrations including a full color photographic essay