1. The prevalence of nutritional anaemia in women in developing countries: a critical review of available information;Royston;World Health Stat Q,1982
2. The prevalence of anaemia in the world;DeMaeyer;World Health Stat Q,1985
3. Anemia during pregnancy and birth outcome: a meta-analysis;Xiong;Am J Perinatol,2000
4. A five-year summary of perinatal care in Suzhou (Abstract in English);Tao;Chin J Obstet Gynecol,1985