@Book{RANME20161202396, title = "Beitrag zur therapie der r\"{u}ckgratsverkr\"{u}mmungen", author = "SIGFRID ULRICH, Axel", publisher = "Anvers : Imprimerie J.E buschmann", editor = "Imprimerie J.E buschmann", URL = "http://bibliotecavirtual.ranm.es/ranm/es/consulta/registro.do?id=22239", year = "1860", }