@article {36598,
	title = {Roughness and color of artificial substratum particles as possible factors in colonization of stream invertebrates },
	volume = {175},
	year = {1989},
	note = {need to find out the names of these streams},
	pages = {89-95},
	publisher = {Hydrobiologia},
	url = {http://www.springerlink.com/content/r744001474502433/fulltext.pdf},
	author = {Clifford, Hugh F. and Gotceitas, Vytenis and Casey, Richard, J.}
}
