Thorium dioxide: Properties and nuclear applications: J. Belle and R.M. Berman, Editors Published by the United States Department of Energy and available from the: National Technical Information Service, US Department of Commerce, 5285 Port Royal Road, Springfield, Virginia 22161, USA. Cost: Hardcover — $45.50; Microfiche — $4.50. Softcover available from US Government Printing Office, Washington, D.C. 20545, $16.00, Stock No. 061-000-00654-1.