United States Census Abbreviations

A statistical study was done in 1923 on coal miners listed in the 1920 census. The codes used follow:

MH - coal miners who were also the heads of their households BD - coal miners who were boarders in a household BWF - coal miners who lived in their parent's household USC - coal miners who were born in the United States USW - coal miners who were born in the United States (don't know of any distinction between the w or the c)