Census tracts. 

 - Washington  The Bureau  19- 
 - v.  tables. 
 - Census of population and housing .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Housing--Statistics.--United States<br/>Census districts--United States.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Population--Statistics.<br/>Puerto Rico<br/>Caguas (P.R.)<br/>Arecibo (P.R.)<br/>Mayagüez (P.R.)<br/>United States--Census<br/>Ponce (P.R.)