1. Attrition of a saguaro forest;Alcorn;Plant Dis. Report.,1962
2. Climate change and ecosystems of the Southwestern United States;Archer;Rangelands,2008
3. Biodiversity and conservation;Boyle,2002
4. Ecology of the saguaro: phenology and establishment in marginal populations;Brum;Madroño,1973
5. Saguaro (Carnegiea gigantea) Demography at the Northeastern Extreme of the Species' Range;Campbell,2011