"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X4D4-G3M : accessed 23 Feb 2013), John Monaghan household, Belleville, Essex, New Jersey; citing enumeration district (ED) 0312, sheet 10A, family 230, NARA microfilm publication T626, roll 1327.