Because ENUMERATION DISTRICTS and CENSUS go hand in hand
PLEASE be sure to check the Enumeration/Wards Page for Census boundaries.
http://www.bklyn-genealogy-info.com/Ward/index.html

AL = alien 
NA = naturalized citizen 
PA = has filed papers for citizenship (first papers) 
NR = not recorded

For Help locating Federal & State Reels & Rolls see below.