id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
inhs-407	Forbes, S. A.	On the Local Distribution of Certain Illinois Fishes: : An Essay in Statistical Ecology	1907	70	.pdf	application/pdf	10197	375	55	For this pur- pose maps of species distribution, and tables showing the local- ity preferences of species (like my Table VI.) must be studied in connection with tables of associative coefficients. And if certain of the species are associated with the other darters in an average ratio of five to one, while other species are associated with the other darters in an aver- age ratio of only two to one, then the former species will typify the ecological group more definitely and correctly than the latter.	cache/inhs-407.pdf	txt/inhs-407.txt