Hansen, Thomas <br/><br/>
Trilobites of the Middle Ordovician Elnes Formation of the Oslo region, Norway / 
by Thomas Hansen 
 - Chichester, West Sussex, UK :  Wiley-Blackwell,  c2009 
 - 215 p. :  ill., maps ;  28 cm. 
 - Fossils and strata,  no. 56  0024-1164 ; .
 - Fossils and strata ;  no. 56 .
<br/><br/> "March 2009"--Cover 
<br/><br/>Includes bibliographical references (p. 150-155) 
<br/><br/><label>ISBN: </label>9781405198844 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trilobites--Norway<br/>Paleontology--Ordovician