Judy Yung, an emerita professor of American studies at the University of California at Santa Cruz whose work helped to document the history of Asian immigration at the former Angel Island Immigration Station and Chinese and Chinese American women, died Dec. 14, 2020, the university Website noted. She was 74.

Yung was the co-author with Erika Lee of the 2010 book “Angel Island: Immigrant Gateway to America,” as well as the 1991 book “Island: Poetry and History of Chinese Immigrants on Angel Island, 1910-1940,” which she co-wrote with historian Him Mark Lai and poet Genny Lim.

She was also the author of “Unbound Voices: A Documentary History of Chinese Women in San Francisco” and “Unbound Feet.” She also authored “Chinese Women of America: A Pictorial History.” A former librarian born and raised in San Francisco’s Chinatown, Yung taught at UC Santa Cruz from 1990 until her retirement in 2004, notes an article on the university’s Website.

Yung was the keynote speaker at the first Nikkei Angel Island Pilgrimage on Oct. 4, 2014, presented by the Nichi Bei Foundation with other organizations.