1. Eolian deposits in the Nebraska Sand Hills, USA;Ahlbrandt,1980
2. A preliminary report on the alkali resources of Nebraska;Barbour;Nebraska Geol. Surv.,1916
3. Chemical diagenesis of some modern carbonate sediments;Berner;Amer. J. Sci.,1966
4. Geology and groundwater resources of the Upper Niobrara River Basin, Nebraska and Wyoming;Bradley;USGS Water-Supply Paper 1368,1956
5. Preliminary report on the potash industry of Nebraska;Condra;Nebraska Conserv. Surv. Bull. 8,1918