Covina (kōvē´nə), city (1990 pop. 43,207), Los Angeles co., S Calif.; inc. 1901. The area was settled in 1842, citrus crops were introduced in 1886, and the citrus industry reached its peak in the 1930s when Covina was one of the world's largest producers. Citrus fruits are still grown and processed, but a newer economic base includes the manufacture of varied products, including medical supplies and fabricated metals.
"Covina." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (January 18, 2019). https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/covina
"Covina." The Columbia Encyclopedia, 6th ed.. . Retrieved January 18, 2019 from Encyclopedia.com: https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/covina