data(Gulk)
str(Gulk)
Gulk$names <- c("Gulkana River","Trib 1","West Fork","Gulkana River","Trib 1",
"West Fork","Trib 2","West Fork","Twelvemile Creek","Gulkana River",
"Middle Fork","Gulkana River","Middle Fork","Hungry Hollow")
str(Gulk)
mapbyname(rivers=Gulk)
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