@book{ BA91357835, author = "Williams, Dudley H. and Fleming, Ian and Zeeh, Bernd", title = "Spektroskopische Methoden in der organischen chemie : 97 abbildungen und 45 tabellen", publisher = "Thieme", year = "1968", URL = "https://ci.nii.ac.jp/ncid/BA91357835" }