June, 1993
Arizona Water Resources,
Joe Gelt
ed.,
vol.
2,
no.
4,
12
pp.,
Water Resources Research Center,
Tucson, AZ,
June, 1993
![](/sites/wrrc.arizona.edu/files/styles/az_natural/public/media/AWR-Jun-93_1.jpg?itok=VjIKziys)
News stories tend to occur in clusters, with several stories about a particular topic suddenly appearing. For example, a number of news stories about fish recently surfaced. With six or seven at last count, the fish stories are running in a school.