1. The Food of Titmice in Oak Woodland
2. - 1967. Preliminary data for estimat-ing the biological production of wanderingspiders. Secondary Productivity of Terres-trial Ecosystems (Principles and Methods)II, Petrusewicz, ed. Polish Academy ofSciences, Warsaw. 821-834 ed. K.Breymeyer821Preliminary data for estimating the biological production of wandering spiders1967