Smith, Patsy Beckstead <br/><br/>
Ecology of Benthonic species / 
by Patsy B. Smith. 
 -- Washington :   United States Government Printing Office,   1964 
 - 55 p., [6] h. de lam. -- 
 (Geological Survey Professional Paper  ;  429-B).
<br/><br/><label>Subjects--Topical Terms: </label><br/>El Salvador<br/>Foraminíferos fósiles
<br/><br/><label>Universal Decimal Class. No.: </label>563.12(728.4)