@Book{RANME20161749457, title = "Ecograf\'{\i}a en obstetricia y ginecolog\'{\i}a", author = "School, Donald", publisher = "Buenos Aires : M\'{e}dica Panamericana", ISBN = "ISBN 9789500609135", editor = "M\'{e}dica Panamericana", URL = "http://bibliotecavirtual.ranm.es/ranm/es/consulta/registro.do?id=76945", year = "2009", }