@inbook{10.7312/youn14608.9,
 URL = {http://www.jstor.org/stable/10.7312/youn14608.9},
 bookauthor = {Sera L. Young},
 booktitle = {Craving Earth: Understanding Pica--the Urge to Eat Clay, Starch, Ice, and Chalk},
 pages = {58--66},
 publisher = {Columbia University Press},
 title = {Poisons and Pathogens},
 year = {2011}
}