Snyder C (2005). "The dirty work of promoting "recycling" of America's sewage sludge". Int J Occup Environ Health. 11 (4): 415–27. PMID16350476.Free full-textDiarkibkan 2011-07-13 di Wayback Machine (registration required)
Snyder C (2005). "The dirty work of promoting "recycling" of America's sewage sludge". Int J Occup Environ Health. 11 (4): 415–27. PMID16350476.Free full-textDiarkibkan 2011-07-13 di Wayback Machine (registration required)
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Snyder C (2005). "The dirty work of promoting "recycling" of America's sewage sludge". Int J Occup Environ Health. 11 (4): 415–27. PMID16350476.Free full-textDiarkibkan 2011-07-13 di Wayback Machine (registration required)