Quarterly maritime report. 

 - [San Juan, P.R.?]  Economics Research Office, P.R. Ports Authority, 
 - v.  28 cm. 
 - 
<br/><br/> Description based on: Apr.-June 1989; title from cover. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shipping--Puerto Rico.--Statistics--Periodicals.