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- [4] INFRA-RED SPECTRA OF PHTHALOCYANINES WITH DIFFERENT CENTRAL METAL ATOMS SPECTROCHIMICA ACTA, 1957, 11 : 573 - 578
- [5] INFRA-RED SPECTRA AND DIFFERENTIAL THERMOGRAMS OF LIGNINS AND SOIL HUMIC MATERIALS SATURATED WITH DIFFERENT CATIONS JOURNAL OF SOIL SCIENCE, 1970, 21 (02): : 265 - &