In: Block, William M.; Finch, Deborah M. (Tech. eds.). Songbird ecology in southwestern ponderosa pine forests: a literature review. Gen. Tech. Rep. RM-292. Fort Collins, CO: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. p. 28-42.,1997, 引用: 7
In: Block, William M.; Finch, Deborah M. (Tech. eds.). Songbird ecology in southwestern ponderosa pine forests: a literature review. Gen. Tech. Rep. RM-292. Fort Collins, CO: U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. p. 103-136.,1997, 引用: 34
