Harvey, F. E. 2001. Stable Hydrogen and Oxygen Isotope Composition of NADP Archived Precipitation at Site CO22 in the Pawnee Grasslands, Northeastern Colorado (OFR-59). 21 pp., size 8.5" x 11". Description: The Pawnee Grasslands lies in the west-central portion of the Great Plains, and is representative of the semi-arid portion of this region. Thus, while much of the report focuses on northeastern Colorado, the data are also representative of the Nebraska panhandle and the larger arid portions of the north central Great Plains. Out of print, unbound copy available.