The series comes from the 'Current Employment Statistics (Establishment Survey)'
The source code is: CES4142400001
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, All Employees: Wholesale Trade: Nondurable Goods [CES4142400001], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/CES4142400001/, August 1, 2015.