Bartsch, Paul <br/><br/>
The pyramidellid mollusks of the pliocene deposits of north St. Petersburg, Florida 

 - Washington, D. C :   Smithsonian Institution,   1955. 
 - 102 p. :   láms. ;   20 cm. 
 - Smithsoian Miscellaneous Colections ;   v.125, nº 2 .