Linked from
The 16 pages that link to Missouri River, each with the reason it gives.
Mississippi River BasinBroader topic: Its vast watershed forms the western portion of the basin.
MissouriRelated: It crosses the state and gives Missouri its name.
Yellowstone RiverNarrower topic: The Yellowstone empties into it near Williston, North Dakota.
Fort Peck DamNarrower topic: Fort Peck Dam regulates a major upper reach of this river.