TY - JOUR AU - Harrison, MH AU - Turner, MH AU - Jacobs, P DO - doi:10.1302/0301-620X.58B1.178665 UR - https://doi.org/10.1302/0301-620X.58B1.178665 TI - Skeletal immaturity in Perthes' disease T2 - The Journal of Bone & Joint Surgery British Volume VL - 58-B IS - 1 PY - 1976 SP - 37 EP - 40 ER -