

@article {7337,
	title = {Occurrence of {Giardia} and {Cryptosporidium} spp. in surface water supplies.},
	journal = {Applied and Environmental Microbiology},
	volume = {57},
	number = {9},
	year = {1991},
	pages = {2610{\textendash}2616},
	url = {http://aem.asm.org/content/57/9/2610.short},
	author = {LeChevallier, Mark W. and Norton, William D. and Lee, Ramon G.}
}
