Pratchett, Terry <br/><br/>
The science of Discworld 
Terry Pratchett, Ian Stewart & Jack Cohen 
 - 1st ed 
 - London  Ebury  2002 
 - 414 p. ; 18 cm 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780091886578 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cosmology<br/>Discworld (Imaginary place) -- Fiction<br/>Fantasy fiction
<br/><br/><label>Dewey Class. No.: </label>523.1 PRA