TIMSS 2019 user guide for the international database

Fishbein, Bethany, Pierre Foy, and Liqun Yin. “TIMSS 2019 user guide for the international database”, Chestnut Hill, Mass.: TIMSS & PIRLS International Study Center, Lynch School of Education and Human Development, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109292.
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