TIMSS 1999 International Science Report

Findings from IEA's repeat of the Third International Mathematics and Science Study at the eighth grade
Martin, Michael O. Mullis, Ina V.S. Gonzalez, Eugenio J. Gregory,Kelvin D. Smith, Teresa A. Chrostowski, Steven J. Garden, Robert A. O'Connor, Kathleen M.
Boston College , Chestnut Hill, MA (2000)
Findings from the TIMSS 1999 science assessment at the eighth grade