Biblio
“Fire History In Riparian Canyon Pine-Oak Forests And The Intervening Desert Grasslands Of The Southwest Borderlands: A Dendroecological, Historical, And Cultural Inquiry”. School Of Renewable Natural Resources. School Of Renewable Natural Resources. Tucson: University of Arizona.
. 1998. Kaib, J. Mark_ Fire History in Riparian Canyon Pine-Oak Forests and the Intervening Desert Grasslands of the Southwest Borderloands A Dendroecological, Historical, and Cultural Inquiry_1998.pdf (24.31 MB) . 1992.
“University Of Arizona Eclipse Expedition, Port Libertad, Sonora, Mexico”. Publications Of The Astronomical Society Of The Pacific XXXVI (No. 212). Publications Of The Astronomical Society Of The Pacific.
. 1923. Douglass, AE_The University of Arizona Eclipse Expedition, Port LIbertad, Sonora, Mexico_1923.pdf (12.3 MB)“The Lowell Observatory In Mexico”. Popular Astronomy. Popular Astronomy.
. 1897. Douglass, AE_The Lowell Observatory in Mexico_1897.pdf (2.59 MB)