Wiens, John A., authorWard, John F., 1946-, authorRotenberry, John T., authorNatural Resource Ecology Laboratory, Colorado State University, publisher2015-07-282015-07-281974http://hdl.handle.net/10217/16003June 1974.On cover: Grassland Biome, Ecosystem analysis studies, U.S. International Biological Program.Includes bibliographical references (page 74).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 ecology -- United StatesBirds -- Food -- United StatesBird populations -- United StatesText