Sonora mining region, California,
Holmes, Roberta Evelyn. **Q.107.4 The southern mines of Californa. Early development of the Sonora mining region.
— San Francisco. The Grabhorn Press. 1930. (9), 60 pp. Portrait. Plates, 2 folded. Maps, 1 folded, Illustrated title-page. 32 cm. Bibliography, pp. 57-60.
No. 88 of an edition of 250 copies.
t This card was printed at the Boston Public Library July 3, 1936. Eo32 — California. Mines and min ines and mining. — Sonora mining
region, California. — Grabhorn Press.