1. Pb-210 dating and lead deposition in the ombrotrophic peat bog, Draved Mose, Denmark;Aaby;Danmarks Geologiske Undersogelse. Arbog.,1978
2. Chemical analysis of ecological materials;Allen,1974
3. Chemical analysis;Bengtsson,1979
4. Phosphorus, iron and manganese distribution in sediment cores of six Wisconsin lakes;Bortleson;Limnology and Oceanography,1974
5. Recent sedimentary history of Lake Monona, Wisconsin;Bortleson;Water, Air and Soil Pollution,1975