TY  - BOOK
AU  - Briggs, Reginald Peter
ED  - Geological Survey (U.S.)  
TI  - Changes in Stratigraphic nomenclature in the Cretaceous system, east-central Puerto Rico
PY  - 1969///
CY  - Whashington
PB  - U.S.Govt. Print. Off.
KW  - Geology, Stratigraphic
KW  - Cretaceous
KW  - fast
KW  - Puerto Rico
N1  - As of 07/01/2016, GPO could not validate the distribution status of this little for the FDLP. 

"Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department.; Includes bibliographical references (pages 29-31)
ER  -