Census for 1820  electronic resource 

 - Washington  rinted by Gales & Seaton  1821 
<br/><br/> "Published by authority of an Act of Congress, under the direction of the secretary of State." 
<br/><br/><label>GPO Item No.: </label>0154-A-14(online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>C 3.223/29-4:C 33