Tolong jelaskan mengenai Kota kembar dari Tucson

Tucson mempunyai sembilan kota kembar:

John Bret Harte: Tucson: Portrait of a Desert Pueblo ; American Historical Press; ISBN 1-892724-25-1 (sampul tebal, terbitan ulang 2001).

Evelyn S. Cooper: Tucson in Focus: The Buehman Studio ; Arizona Historical Society; ISBN 0-910037-35-3 (sampul tebal, 1995). Contoh Koleksi Buehman, termasuk 250.000 negatif piringan kaca dan nitrat dari tahun 1870-an hingga 1950-an.

Roy P. Drachman: From Cowtown to Desert Metropolis: Ninety Years of Arizona Memories; Whitewing Press; ISBN 1-888965-02-9 (sampul tebal, 1999); ISBN 1-888965-03-7 (sampul tipis, 1999).

Bernard L. Fontana: Biography of a Desert Church: The Story of Mission San Xavier del Bac; Tucson Corral of the Westerners; ASIN B0006RHO88 (sampul tipis, 1996)

George Hand:  The Civil War in Apacheland ; (Bagian 1 dari buku harian George Hand) High Lonesome Books; ISBN 0-944383-36-X (sampul tipis, 1996).

George Hand: Whiskey, Six-Guns and Red-Light Ladies; (Bagian 2 dari buku harian George Hand) High Lonesome Books; ISBN 0-944383-30-0 (sampul tipis, 1995).

Bonnie Henry: Another Tucson; Arizona Daily Star; ISBN 0-9607758-2-X (sampul tebal, 1992).

Rosalio Moisés: The Tall Candle: The Personal Chronicle of a Yaqui Indian ; University of Nebraska Press; ISBN 0-8032-0747-6 (sampul tipis, 2001).

Muriel Thayer Painter: A Yaqui Easter; University of Arizona Press; (sampul tipis, 1971) Baca online .

Federico Jose Maria Ronstadt: Borderman, the Memoirs of Federico Jose Maria Ronstadt; University of New Mexico Press. (sampul tebal, 1993) Baca online .

Don Schellie: Vast Domain of Blood: The Story of the Camp Grant Massacre; Westernlore Press; ASIN B0006BW3N0 (sampul tipis, 1968).

Jack Sheaffer and Steve Emerine: Jack Sheaffer's Tucson, 1945-1965 Arizona Daily Star; ISBN 0-9607758-1-1 (sampul tebal, 1985).

Thomas E. Sheridan: Del rancho al barrio: The Mexican legacy of Tucson; Arizona Historical Society (sampul tipis, 1983)

Thomas E. Sheridan: Los Tucsonenses: The Mexican Community in Tucson, 1854-1941; University of Arizona Press; ISBN 0-8165-1298-1 (sampul tipis, terbitan ulang 1992)

C. L. Sonnichsen: Tucson: The Life and Times of an American City; The classic book on Tucson's history; University of Oklahoma Press; ISBN 0-8061-2042-8 (sampul tipis, terbitan ulang 1987)

Arizona Daily Star: Star 200 Trend Tracker

Bancroft: History of New Mexico and Arizona, San Francisco, 1880