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The Library Catalogue will tell you whether we hold the book you require and where to find it. The main part of the description tells you title, author and publication details. Look at the Copy details in the lower box to find out which Library holds copies. Most copies are in the Main Collection, but you must note the Class Number so that you know which floor you should go to! Class numbers are given to all books according to the subject. The result is that books on similar subjects are grouped together and you can browse.
Example of a catalogue entry for a book in the Perry Library
Books are shelved under Class Numbers according to the Dewey scheme. Books on the same subject get the same number. All subjects are given a number between 0 and 999. For example, economics is 330, and criminal law is 345. The numbers are further divided in decimals for more detailed subjects. For example, health aspects of smoking are 613.85. Therefore very specific subjects can get very long numbers. How are the books actually shelved according to these numbers?
They are shelved numerically 0-999 and by decimal after the decimal point. Where there are several books with the same number they are then shelved alphabetically according to the author's name.
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History of North America History of United States of America American Civil War Origins of the American Civil War The Confederacy in the American Civil War |

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