Breen, Walter, and Ronald J. Gillio. CALIFORNIA PIONEER FRACTIONAL GOLD. HISTORIC GOLD RUSH SMALL CHANGE 1852–1856 AND SUPPRESSED JEWELERS' ISSUES 1859–1882. Santa Barbara, 1983. 4to, original pictorial card covers. (2), 160 pages; well illustrated. Covers a bit worn; very good or better. Originally written as an auction catalogue of the famous collection formed by Ed and Kenny Lee, this work features a great deal of original research by Breen. After the collection was sold privately before the sale, the text was suitably edited and the published work became the standard work on the topic.