There are two good obituaries for Louise Reiss:
http://www.nytimes.com/2011/01/10/science/10reiss.html
http://www.stltoday.com/news/local/-obituaries/article_bc5094d0-34b1-5c14-b4b0-fd8251cb7990.html.
Strontium-90
Category Radiation and Cancer.