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Johansone , I. (2016). Survey Operations Procedures in TIMSS Advanced 2015. In M. O. Martin, I. V. S. Mullis, & M. Hooper (Eds.), Methods and Procedures in TIMSS Advanced 2015 (pp. 6.1-6.20). Retrieved from Boston College, TIMSS & PIRLS International Study Center website: https://timssandpirls.bc.edu/publications/timss/2015-a-methods/chapter-6.html
Methods and Procedures in TIMSS Advanced 2015
Michael O. Martin, Ina V.S. Mullis, and Martin Hooper, Editors
Ieva Johansone