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Due to changes in U.S. customs regulations, all shipments to the United States are now subject to customs clearance.
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![Cover for J.R. Buchi · Decidable Theories: Vol. 2: The Monadic Second Order Theory of All Countable Ordinals - Lecture Notes in Mathematics (Paperback Book) [1973 edition] (1973)](https://imusic.b-cdn.net/images/item/original/452/9783540063452.jpg?j-r-buchi-1973-decidable-theories-vol-2-the-monadic-second-order-theory-of-all-countable-ordinals-lecture-notes-in-mathematics-paperback-book&class=scaled&v=1546443433)