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Johansone, I. (2016). Survey Operations Procedures in TIMSS 2015. In M. O. Martin, I. V. S. Mullis, & M. Hooper (Eds.), Methods and Procedures in TIMSS 2015 (pp. 6.1-6.22). Retrieved from Boston College, TIMSS & PIRLS International Study Center website: http://timss.bc.edu/publications/timss/2015-methods/chapter-6.html
Methods and Procedures in TIMSS 2015
Michael O. Martin, Ina V.S. Mullis, and Martin Hooper, Editors
Ieva Johansone