Herngreen, G. F. W. <br/><br/>
Palynology of middle and upper cretaceous strata in Brazil / 
G. F. W. Hergreen. 
 - The Netherlands :   Drukkerij H. van der Marck & Zonen,   1975. 
 - 51 p. ;    28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Palynology--Brazil.<br/>Geology, Stratigraphic -- Cretaceous.