Uyeno, T.T. <br/><br/>
Some Late Middle Devonian (Polygnathus varcus Zone) conodonts from central Mackenzie valley, district of Mackenzie 

 - Ottawa, Ontario  Geological Survey of Canada  1978 
 - pp. 13-23  lám. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CONODONTA<br/>DEVONICO
<br/><br/><label>Subjects--Geographic Terms: </label><br/>CANADA