Sultana, M.H., Lam-Po-Tang, P., Suyitno, H. and Soemantri, A. 1996. Chromosomal abnormalities in mentally retarded boys other than Down’s Syndrome in Indonesian special schools. Medical Journal of Indonesia. 5, 3 (Jul. 1996), 123–7. DOI:https://doi.org/10.13181/mji.v5i3.858.