Middle Danubian Plain

chickarees coefficient of pulsation Coptotermes curvignathus Holmgren cup flow figure elongated grain emelamine four angle dip net Mockrehna nature-printings prestructure rectifying tank request for Rhododendron densifolium second growth stand selective identification feature self-denial Sladkovskoye technological self reliance viola formosana stenopetala winter-house