Columbia subject headings:
Employees--Mental health--United States--Statistics.
Employees--Substance use--United States--Statistics.
Unemployed--Mental health--United States--Statistics.
Unemployed--Substance use--United States--Statistics.
Harvard subject headings:
Employees--Mental health--United States--Statistics.
Employees--Substance use--United States--Statistics.
Unemployed--Mental health--United States--Statistics.
Unemployed--Substance use--United States--Statistics.
Princeton subject headings:
Employees--Mental health--United States--Statistics.
Employees--Substance use--United States--Statistics.
Statistics.
Unemployed--Mental health--United States--Statistics.
Unemployed--Substance use--United States--Statistics.