Johnson, J.R.; Nichols, J.T. 1970. Plants of South Dakota grasslands: A photographic study. Brookings, SD: South Dakota State University, Agricultural Experiment Station. 163 p.

Johnson, J.R.; Nichols, J.T. 1970. Plants of South Dakota grasslands: A photographic study. Brookings, SD: South Dakota State University, Agricultural Experiment Station. 163 p.