1. S.R. Aldrich, W.R. Oschwald, and J.B. Fehrenbacher, 1970. Implications of crop production technology for environmental quality. AAAS Meeting, Chicago, Ill.
2. Lead in Illinois agriculture;Alexander;Univ. Ill. Urbana,1971
3. Agronomic controls over the environmental cycling of trace elements;Allaway;Adv. Agron.,1968
4. Evaluation of incoming and outgoing processes that affect soil nitrogen. Soil Nitrogen, Madison, Wisc;Allison;Am. Soc. Agron.,1965
5. B.J. Alloway, 1969. The soil and vegetation of areas affected by mining for non-ferrous metalliferous ores with special reference to Cd, Cu, Pb and Zn. Ph.D. Thesis, Univ. Wales.