Robert Gottlieb and Irene Wolt Thinking Big: The Story of the Los Angeles Times, Its Publishers and Their Influence on Southern California, G.P. Putnam's Sons: NY, 1977. 603 pp., 1911
"In 1911 Huntington's system was bought out by the Southern Pacific Railroad, which had finally decided to join with Los Angeles's booster businessmen. Huntington maintained a smaller company, the Los Angeles Railway Company, which he called the "yellow cars," in contrast to the SP subsidary Pacific Electric Railroad's "Big Red" cars . . ." p. 249 Gottlieb and Wolt, 1977