TY - JOUR AU - Blakemore, ME AU - Harrison, MH DO - doi:10.1302/0301-620X.61B3.479256 UR - https://doi.org/10.1302/0301-620X.61B3.479256 TI - A prospective study of children with untreated Catterall group 1 Perthes' disease T2 - The Journal of Bone & Joint Surgery British Volume VL - 61-B IS - 3 PY - 1979 SP - 329 EP - 333 ER -