Ellis, S R <br/><br/>
History of dredging and filling of lagoons in the San Juan area, Puerto Rico 
S.R. Ellis. 
 - Washington  U.S. Geological Survey  1976. 
 - iv, 25 p.  maps (fold in pocket) 
 - Water-resources investigations  no.38-76 .
<br/><br/><label>LCCN: </label>fel36001785  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lagoons--San Juan, P.R.<br/>Dredging.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico