Pediatric orthopedics in practice / Fritz Hefti ; foreword second edition from S. Wientroub and D.R. Wenger ; foreword first edition from J.R. Kasser and G.D. MacEwen ; in collaboration with R. Brunner, F. Freuler, C. Hasler, G. Jundt, and A. Krieg ; translated by R. Hinchliffe ; freehand drawings by F. Freuler ; schematic drawings by F. Hefti/ Second edition / Berlin : Springer , cop. 2015