The primary source is the official manuscript returns in the 1898-1918 poll book, located at the Nevada State Archives in Carson City. The results were also printed in 1901-1902 Biennial Report of the Secretary of State but this report contains misprints for Ryan in Esmeralda and Lincoln counties.
Source for Popular Vote data: Nevada State Archives, "State Treasurer," Election Returns of General Election held on the fourth day of November, A.D. 1902 (Carson City, 1902)