1. Studies on the infrared spectra of some divalent transitional metal humates;Banerjee;J. India Soc. Soil Sci.,1972
2. Use of IR-spectral and EPR methods for studying ion-exchange reactions of peat and humic acids;Belkevich,1973
3. Effect of extractant and molecular size on the optical and chemical properties of soil humic acids;Butler;Aust. J. Soil Res.,1969
4. Etude par spectrographie infrarouge des produits de l'humification en milieu hydromorphe calcique;Dupuis;Sci. Sol Suppl. Bull. Assoc. Etude Sol,1969
5. Aplicacion de la espectroscopia infraroja al estudio de la accion de los extractantes: hidroxido sodico y resina lewatit-100 sobre la fraccion humidificada de la materia organica;Hernando;Anal. Edafol. Agrobiol.,1971