@article{doi:10.1302/0301-620X.33B4.634,
author = {Charnley, John and Wright, J. K.},
title = {A SPRING EXERCISER FOR ARTHROPLASTY OF THE HIP JOINT},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {33-B},
number = {4},
pages = {634-635},
year = {1951},
doi = {10.1302/0301-620X.33B4.634},
url = {https://doi.org/10.1302/0301-620X.33B4.634}
}