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Document type:
Zeitschriftenaufsatz 
Author(s):
Knicker H, Frund R, Ludemann H 
Title:
Characterization of the nitrogen in plant composts and native humic material by natural abundance N-15 CPMAS and solution spectra 
Journal title:
Nuclear Magnetic Resonance Spectroscopy in Environmental Chemistry 
Year:
1997 
Pages contribution:
272-294