Poulton, T.P. <br/><br/>
Aalenian ammonites and strata of Western Canada 

 - Ottawa, Ontario  Geological Survey of Canada  1991 
 - pp. 1-71  láms. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AMMONOIDEA<br/>JURASICO
<br/><br/><label>Subjects--Geographic Terms: </label><br/>CANADA