[Classification of the avian summer population of the Western Siberian plain]. / Klassifikatsiia letnego naseleniia ptits zapadno-sibirskoi ravniny.

The proposed classification system reflects the difference between the three population systems: unbuilt land, built-up land, and aquatic-semiaquatic communities. Two superorder groups--north and median--further divided into types were recognized in each of the systems. Most types are divided into subtypes, classes, and subclasses (and sometimes genera of the population). The estimation of the power and generality of the influence of environmental factors (their variability correlates with heterogeneity of the avian population) has demonstrated that forestation of the territory is most significant in the first half of summer on the western Siberian Plain. The composition of the forest-forming species and zoning are less affected. The influence of moisture and hydration is 2-3 times less significant; mesorelief is 4-5 times less significant; and productivity (feeding capacity) and anthropogenic influence are 7-9 times less significant.

[Determination of the need of polyclinic departments and offices for dental equipment]. / Opredelenie potrebnosti poliklinicheskikh otdelenii i kabinetov v stomatologicheskom oborudovanii.

The calculating method of stomatologic instrumentation optimum quantity required for an outpatient department (room) is presented. It is based on the stop-watch study performed in the course of therapeutic or diagnostic procedures. The new method allows the assessment of the need of any establishment in instrumentation when appropriate requests are executed, and to make the most efficient use of instruments at the working place.