Sturman, W. A. 1968. The foraging ecology of Parus 

 atricapillus and P. rufescens in the breeding sea- 

 son, with comparisons with other species of Parus. 

 Condor. 70: 309-322. 



Szaro, R. C; Balda, R. P. 1979. Bird community 

 dynamics in a ponderosa pine forest. Studies in 

 Avian Biology. 3: 1-66. 



Thomas, J. W.; Anderson, R. G.; Moser, C; Bull, 

 E. L. 1979. Snags. In: Thomas, J. W., ed. Wildlife 

 habitats in managed forests: The Blue Mountains 

 of Oregon and Washington. Agric. Handb. 553. 

 Washington, DC: U.S. Department of Agriculture: 

 60-77. 



U.S. Department of Agriculture, Forest Service. 

 1985. Arizona Forest Survey field procedures 

 1985. Ogden, UT: U.S. Department of Agriculture, 

 Forest Service, Intermountain Research Station. 

 2 parts. 



Van Home, B. 1983. Density as a misleading indica- 

 tor of habitat quality. Journal of Wildlife Man- 

 agement. 47: 893-901. 



Vemer, J.; Ritter, L. V. 1985. A comparison of 

 transects and point counts in oak-pine woodlands 

 of California. Condor. 87: 47-68. 



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