1. (a) See, for example, Sadtler Research Laboratories, Nuclear Magnetic Resonance Spectra, Philadelphia 1965-1980.
2. (b) and Carbon-13 NMR-Spectra, Wiley Interscience, New York (1972).
3. Handbook of NMR Spectral Parameters, Heyden, London (1979).
4. and Atlas of Carbon-13 NMR Data, Heyden, London (1975).