Pierce Richard L <br/><br/>
Lower upper cretaceous plant microfossils from minnesota 

 -  1961 
 - xi,86p.  cm. 
<br/><br/> References 75-81p 
<br/><br/><label>Standard No.: </label>50187 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Paleobotany<br/>Botany
<br/><br/><label>Dewey Class. No.: </label>I:8-19.7373, K1