1. Table A.2, Office for National Statistics. 2001. Student achievement in EnglandResults in reading.mathematical and scientific literacy among 15-year-olds from the OECD PISA 2000 study,
2. Appendix A: sample design, response and weighting, Office for National Statistics. 2001. Student Achievement in England: results in reading.mathematical and scientific literacy among 15-year-olds from the OECD PISA 2000 study,
3. Office for National Statistics. 2001. Student Achievement in England: results in reading.mathematical and scientific literacy among 15-year-olds from the OECD PISA 2000 study,