Unknown Author
A. P. Derevi͡anko
Vladimir Lazaris
Michael L. Skolnik
Sŏ, Yu-gil.
Gerhard Thiel
Great Britain. Department of Employment.
A. P. Derevi︠a︡nko
Jackson of Burnley, Willis Jackson Baron
T. A. Mozyreva
Walter J. Brooking
Neil Harris
Institute of Applied Manpower Research (India)
United States. Bureau of Labor Statistics.
Diego López Garrido
Muriel Venning
Norges teknisk-naturvitenskapelige forskningsråd.
V. N. Abramov
Hungary. Központi Statisztikai Hivatal