| Author: | Grigorovich, I.A., T.R. Angradi, and C.A. Stepien |
| Article Title: | Occurrence of the quagga mussel (Dreissena bugensis) and the zebra mussel (Dreissena polymorpha) in the Upper Mississippi River system. |
| Journal Name: | Journal of Freshwater Ecology |
| Keywords: | invertebrate, mollusk, bivalve, Dreissena bugensis, quagga mussel, Mississippi River |