Characterization of the organic matter by using the d13C-value of a permafrost site in the Kolyma-Indigirka-Lowland, Northeast Siberia Pfeiffer, Eva-Maria Janssen, H. 1995 - Forschungsinformationssystem der UHH
C-isotope analysis of permafrost soil samples of NE-Siberia Pfeiffer, Eva-Maria Janssen, H. 1992 - Forschungsinformationssystem der UHH