1. Allen BL, Harris BL, Davis KR, Miller GB (1972) Mineralogy and chemistry of High Plains playa lake soils and sediments. Texas Tech University Water Resources Center, Lubbock
2. Bolen EG, Smith LM, Schramm HL (1989) Playa lakes: Prairie wetlands of the Southern High Plains. Bioscience 39:615–623
3. Cariveau AB, Pavlacky D (2008) Assessment and conservation of playas in eastern Colorado. Rocky Mountain Bird Observatory, Brighton
4. Cariveau AB, Johnson L, Sparks R (2007) Biological inventory and evaluation of conservation strategies in southwest playa wetlands. Rocky Mountain Bird Observatory, Brighton
5. Fenneman NM (1931) Physiography of western United States. McGraw-Hill, New York