Short Tandem Repeat (STR): A short DNA motif (pattern) repeated in tandem. ATGC repeated eleven times would give the marker a value or allele of 11.
Federal Census records are available to the public 72 years after they are taken.
A citation is a reference to a source of information.
[Sources & Evidence]
In 1820 the Federal Government began requiring ship manifest lists but the early years can be difficult to locate.
Be sure to check for a town or county historical society in the area you are researching. Know their hours of operation and their visitor rules.