Henry, C.J. and R. Ruelle. 1992. A study of pallid sturgeon and shovelnose sturgeon reproduction. U.S. Fish and Wildlife Service. 19 pp.

Ruelle, R. 1991. A contaminant evaluation of interior least tern and piping plover eggs and chicks on the Missouri River, South Dakota. U.S. Fish and Wildlife Service. 18 pp.

Ruelle, R. 1991. A pesticide and toxicity evaluation of wetland waters and sediments on National Wildlife Refuges in South Dakota. U.S. Fish and Wildlife Service. Contaminant Report Number: R6/804P/91. 27 pp.

Ruelle, R. and C. Henry. 1993. Contaminant and toxicity evaluation of National Wildlife Refuge and private wetlands in South Dakota. U.S. Fish and Wildlife Service Contaminant Report Number: R6/814P/93. 36 pp.

Ruelle, R. and C. Henry. 1994. Life history observations and contaminant evaluation of pallid sturgeon, final report. U.S. Fish and Wildlife Service. 33 pp.

Ruelle, R.R. and C.J. Henry. 1995. Survey of organophosphate insecticides in wetlands near sunflower fields in South Dakota, final report. 15 pp.

Ruelle, R. and K.D. Keenlyne. 1992. Contaminants in Missouri River sturgeon. U.S. Fish and Wildlife Service. SD-DEC-93-01. 12 pp.

Ruelle, R, R. Koth, and C. Stone. 1993. Contaminants, fish, and hydrology of the Missouri River and western tributaries, South Dakota. U.S. Fish and Wildlife Service. Pp. 449-490. In: Hesse, L.W., C. Stalnaker, N. Benson, and J. Zuboy (eds). River Ecosystem. Biological Report 19, National Biological Survey, Washington, D.C. October 1993.

Sowards, C., S. Maxwell, and R. Ruelle. 1991. A compendium of environmental contaminants in South Dakota fish, wildlife, and habitats. U.S. Fish and Wildlife Service Contaminant Report Number: R6/812P/91. 93 pp.