1. Untersuchungen der lateralaen Wasserbewegung in ungesättigten Böden;Blume;Z. Pflanzenernaehr., Dueng., Bodenkd.,1969
2. Nitrogen transformations in Ontario forest Podzols;Corke,1958
3. Micronutrient soil tests;Cox,1972
4. Effects of species and arrangement of forests on evapotranspiration;Douglass,1967
5. Soil chemistry and plant nutrition;Drake,1964