TY - NEWS T1 - Halleys Comet T2 - Tucson Citizen Y1 - 1910 A1 - Douglass, A.E. KW - astronomy KW - comet KW - Douglass KW - Halleys KW - historic KW - newspaper KW - tucson JF - Tucson Citizen CY - Tucson N1 - This title is available through the Tree Ring Laboratory; please contact the lab for more information. ER -