id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
inhs-117	Esarey, Joan; Soucek, David J.; Levengood, Jeffrey M.; Hudson, Robert J.; Wimer, Wade; Halbrook, Richard S.	Contaminants in Unionid Mussels from the Confluence of the Mississippi and Illinois Rivers	2008	24	.pdf	application/pdf	10199	523	58	DISCUSSION Numerous biotic and abiotic factors contribute to the variability of contaminant concentrations in freshwater mussel populations. Although Fe, Pb, and Zn were observed in digested blanks, the concen- trations were extremely low compared with sample concentration levels.	cache/inhs-117.pdf	txt/inhs-117.txt