@article{doi:10.1302/0301-620X.41B3.465,
author = {O'Garra, J. A.},
title = {THE RADIOGRAPHIC CHANGES IN PERTHES' DISEASE},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {41-B},
number = {3},
pages = {465-476},
year = {1959},
doi = {10.1302/0301-620X.41B3.465},
url = {https://doi.org/10.1302/0301-620X.41B3.465}
}