%0 Journal Article %A J. A. Fernandez de Valderrama %T THE "OBSERVATION HIP" SYNDROME AND ITS LATE SEQUELAE %D 1963 %J The Journal of Bone & Joint Surgery British Volume %P 462-470 %V 45-B %N 3 %R 10.1302/0301-620X.45B3.462 %U https://doi.org/10.1302/0301-620X.45B3.462 %K