United States. General Accounting Office
William John Macquorn Rankine
Statistics Canada.
John Bowe
Weaver, David H.
Japan. Sōmushō. Tōkeikyoku
Ernst Leo Küng
Teresita L. Chan-Kopka
Joyce P. Simkin
United States. Bureau of Labor Statistics.
Unknown Author
United States. Bureau of Labor Statistics
Joel M. Cohen
Japan. Sōmuchō. Tōkeikyoku
Andrew I. Kohen
Luis Roberto Acosta
Cauchi, Peter.