1. Soil and plant factors influencing the accumulation of heavy metals by plants;Cataldo;Environ. Health Persp.,1978
2. Forms of trace elements in soils, sediments and associated waters: An overview of their determination and biological availability;Jenne,1977
3. Chemical properties of soils;Keeney,1977
4. Chemical Equilibria in Soils;Lindsay,1979
5. Microbial Ecology;Alexander,1971