The Toxicology of Male Reproduction - http://www.brighton73.freeserve.co.uk/tomsplace/scientific/msc-review/msr-top.htm A review produced as part of an MSc Thesis.
Toxnet - http://toxnet.nlm.nih.gov/ Searchable system of databases on toxicology, hazardous chemicals, and related areas by the National Library of Medicine.