Wiens, John A., authorRotenberry, John T., authorWard, John F., authorNatural Resource Ecology Laboratory, Colorado State University, publisher2007-01-032007-01-031974http://hdl.handle.net/10217/16000October 1974.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.Grassland animals -- United StatesBird populations -- United States -- MeasurementText