@Book{RANFE2009002309, title = "Travaux practiques de chimie organique", author = "Ullmann, Fritz", publisher = "Par\'{\i}s : H. Dunod et E. Pinat", editor = "H. Dunod et E. Pinat", URL = "http://bibliotecavirtual.ranf.com/i18n/consulta/registro.do?id=2309", year = "1913", }