共 15 条
- [1] Breitmaier E., 1987, CARBON 13 NMR SPECTR
- [2] FRIMMEL FH, 1988, HUMIC SUBSTANCES THE
- [3] THE SEPARATION OF LOW-MOLECULAR WEIGHT HUMIC-ACID FRACTIONS AND THEIR CHARACTERIZATION BY HR-C-13-NMR IN SOLUTION [J]. ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE, 1988, 151 (05): : 303 - 305
- [4] FRUND R, 1988, THESIS REGENSBURG
- [5] FRUND R, 1986, NATURFORSCH C, V42, P205
- [8] KALINOWSKI HO, 1984, 13 C NMR SPEKTROSKOP
- [10] Mehring M., 1983, HIGH RESOLUTION NMR