共 50 条
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- [2] ELECTRON-SPIN RESONANCE SPECTROMETRY OF HUMIC SUBSTANCES SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS, 1972, 36 (02): : 301 - +
- [3] STUDIES ON ORIGIN + STRUCTURE OF SOIL HUMIC ACIDS BY ELECTRON SPIN RESONANCE INDIAN JOURNAL OF CHEMISTRY, 1967, 5 (11): : 587 - &