Part 1 Ecological foundations of quantitative studies, M. Gorny and L. Grum. Part 2 Selected aspects of mathematical statistics, K. Kasprzak: types of characteristics; random samples and sampling; probability and types of distribution; parameters of a characteristic studied in a general population; relationship between standard deviation and general characteristics of distributive series; correlation; sample size. Part 3 Methods for the investigation of the spatial distribution of the soil faune, T. Huflejt and A.J. Karwowski: the method of indexes; comparing empirical and theoretical distributions; the method of regression; determination of the type of spatial distribution of single individuals. Part 4 Apparatus and tools for the extraction of animals from the soil, M. Kaczmarek: tools for taking core sampling units of soil; tools and apparatus for extracting animals from core samples; tools and apparatus facilitating the sorting of faunistic material obtained from soil samples. Part 5 Methods for the assessment of population density: protozoa, K. Jopkiewicz and H. Sztrantowicz; gastrotricha, J. Kisielewski; turbellaria, J. Kolasa; nematoda, J. Kozlowska and L. Wasilewska; gastropoda, A. Kalinowska; lumbricidae, K. Jopkowicz; encytraeidae, M. Gorny; aelosomatidae, potamodrilidae, naididae, tubificidae, lumbriculidae and haplotaxidae, K. Kasprzak; isopoda, diplopoda and chilopoda, T. Stachurska-Hagen; collemboia, M. Kaczmarek; formicidae, J. Petal and B. Pisarski; other insects; acarida, W. Niedbala and A. Rajski; araneida, A. Kajak; vertebrata, G. Bujalska. Part 6 Methods for fixing and perservating soil animals, K. Kasprzak: the study of live speciments; fixing; preservation and storage of fixed material; detailed methods of fixing and preservation; formulae for compound fixinf fluids, stains, mountants and narcotics. Part 7 Methods for the measurement of the biomass of soil fauna, H. Zyromska-Rudzka: detailed measurement recommendations. Part 8 Biocoenotic indexes used in the ordering and analysis of data in quantitative studies, K. Kasprzak and W. Niedbala: analytical indexes; synthetic indexes; methods for the ordering and grouping of elements on the basis of similarity. Part 9 Methods of zoocoenological analysis, J. Luczak and T. Wierzbowska.