Note 42 — Chapter II · SOURCES OF SUPPLY OF PLATINUM AND ALLIED METALS (a) BRITISH EMPIRE
Reading edition
Hill, Jas. M.: “Platinum and Allied Metals in 1916,” U.S. Geol. Surv., July 12, 1917.
Reading edition
Hill, Jas. M.: “Platinum and Allied Metals in 1916,” U.S. Geol. Surv., July 12, 1917.