Cretaceous and lower tertiary stratigraphy in northwestern Puerto Rico 
by David H. McIntyre, John M. Aaron and Othmar T. Tobisch 
 - Washington  U.S Govt. Print. Off.  1970 
 - iii 16 pages  illustrations, maps  24 cm 
<br/><br/> As of 07/18/2016, GPO could not validate the distribution status of this tittle for the FDLP  Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department.  United States Department of the Interior, Geological survey. 
<br/><br/>includes bibliographical references (page 16) 
<br/><br/><label>Subjects--Chronological Terms: </label>
<br/><br/><label>Subjects--Topical Terms: </label>--Puerto Rico--Cretaceous--Tertiary
<br/><br/><label>Subjects--Geographic Terms: </label>
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.3:1294-D