Briggs, Reginald P.  1929- <br/><br/>
Changes in stratigraphic nomenclature in the cretaceous system east-central Puerto Rico / 
by Reginald P. Briggs. 
 - Washington:   United States Government Printing Office,   1969.  
 - iii, O31 p. :  maps, tables ;  23 cm. 
 -  1274 Contributions to StratigraphyChapter O .
<br/><br/> Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department. 
<br/><br/>Includes bibliographical references (p. O29-O31). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Catalogue--Puerto Rico
<br/><br/><label>Dewey Class. No.: </label>551.7