Petaluma (pĕtəlōō´mə), city (1990 pop. 43,184), Sonoma co., W Calif.; inc. 1858. Founded in 1833 by a colony of Mexicans, Petaluma is a former major poultry and egg center that has grown into a full-fledged suburb since 1970. Its population has increased accordingly. Local industries produce fabricated metal products, baked goods, dairy products, and telecommunications products among others.
"Petaluma." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/petaluma
"Petaluma." The Columbia Encyclopedia, 6th ed.. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/petaluma