Graul, Walter D., authorNatural Resource Ecology Laboratory, Colorado State University, publisher2007-01-032007-01-031972http://hdl.handle.net/10217/15866December 1972.On cover: Grassland Biome, Ecosystem analysis studies, U.S. International Biological Program.born digitaltechnical reportsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Birds -- Breeding -- Colorado -- Weld CountyPloversText