 | Grazing Colorado. | (2) |
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 | Response of seeded ranges to different grazing intensities in the ponderosa pine zone of Colorado / by Pat O. Currie and Dwight R. Smith. Currie, Pat O. 4n : U.S. Dept. of Agriculture, Forest Service, 1970. | |
| Effects of cattle grazing on a ponderosa pine-bunchgrass range in Colorado / Dwight R. Smith. Smith, Dwight R. 1n Washington : U.S. Dept. of Agriculture, 1967. | |
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