About this article
Published Online: Sep 02, 2014
Page range: 425 - 429
DOI: https://doi.org/10.2478/jos-2014-0025
© by Eva Elvers
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Eva Elvers
Statistics Sweden, Process Department, P.O. Box 24300, SE-10451 Stockholm, Sweden.