Sources

Frua mandarin (opens in a new tab)

University of California, Riverside — Citrus Variety Collection

https://citrusvariety.ucr.edu/crc3022 (opens in a new tab)

Accessed September 18th

Horticultural Varieties of Citrus, Chapter 4: Frua Mandarin (opens in a new tab)

Robert Willard Hodgson · University of California, Division of Agricultural Sciences, Berkeley · 1967

https://web.archive.org/web/20110516091632/http://lib.ucr.edu/agnic/webber/Vol1/Chapter4.html (opens in a new tab)

Hodgson’s Frua entry in Chapter 4 of The Citrus Industry, Vol. I, 2nd ed. The archived chapter capture locates the entry at line 2120; a printed page for Frua was not verified. The entry describes fruit and tree characteristics and attributes the King × Dancy cross to H. B. Frost at Riverside, with selection in 1925 and release in 1950. The Wayback URL is the retrieval route for the original chapter.

Accessed October 4th

Frua and Dweet: Two New Citrus Varieties That Produce Good-Sized Fruit with Tangerine-like Flavor (opens in a new tab)

Howard B. Frost; James W. Cameron · University of California Agricultural Experiment Station, College of Agriculture · 1951-02

https://archive.org/details/fruadweettwonewc0721fros (opens in a new tab)

Bulletin 721, February 1951. Frua mandarin account and Frua–Dancy comparison: printed pp. 3–5; Table 1 on p. 4. Data are Riverside samples, with table-specific tree/fruit counts, harvest dates, and rootstocks. Printed pp. 9–10 give botanical descriptions. The issue describes these as experimental varieties, with limited location and trial evidence.

Accessed October 9th