1. The Infra-Red Spectra of Complex Molecules;Bellamy,1957
2. Physico-Chemical Characteristics of Humus Acids in Main Soil Types of Moldavia;Dubin,1969
3. Thermogravimetric characteristics and kinetic parameters of humus acid thermodestruction in main soil types of Moldavia;Dubin;Pochvovedenie,1970
4. Differential thermal analysis study of organic substances extracted from hydromorphic calcareous soils;Dupuis;Ann. Agron.,1970
5. Soil Organic Matter;Kononova,1966