Gold placer area in Mongolia, China.

Gold mining in northeastern Nicaragua.
Published: (1915)

Austrian ""gold balance'' law.
Published: (1925)

Recovery of fine gold by amalgamation.
Published: (1928)

""Unknown buyer'' in London gold market.
Published: (1928)

The new supplies of gold : facts, and statements, relative to their actual amount : and their present and probable effects.
by: Newmarch, William, 1820-1882
Published: (1853)

Recovery of gold from black sand tailings.
Published: (1920)

Reserves of central banks and world's gold supply.
Published: (1930)

Recovery of gold from magnetic black sand.
Published: (1920)

Issue of gold certificates for bullion and foreign coin.
Published: (1911)

Recovery of gold from black sand by classifier concentration.
Published: (1920)

Comparison of methods of gold recovery from black sand.
Published: (1920)

A serious fall in the value of gold ascertained : and its social effects set forth /
by: Jevons, William Stanley, 1835-1882
Published: (1863)

Use of gold and other metals among ancient inhabitants of Chiriqui, Isthmus of Darien.
Published: (1887)

Historical summary of gold, silver, copper, lead, and zinc produced in California, 1848 to 1926.
Published: (1929)

History and development of gold dredging in Montana; with chapter on placer-mining methods and operating costs.
Published: (1916)

Sampling of gold bullion, illustrated by specific cases drawn from actual practice in Mint Service.
Published: (1913)

Federal placerƯmining laws and regulation; Small-scale place-mining methods.
Published: (1938)

Federal placer­mining laws and regulation; Small-scale place-mining methods.
Published: (1938)

Sampling and testing of gold-Ưscheelite placer deposit in Mojave Desert, Kern and San Bernardino counties, Calif.
Published: (1937)

Sampling and testing of gold-­scheelite placer deposit in Mojave Desert, Kern and San Bernardino counties, Calif.
Published: (1937)

Reconnaissance of placer mining in Boise County, Idaho.
Published: (1938)

Gold mining and milling in Black Canyon area, Yavapai County, Ariz.
Published: (1936)

Gold mining and milling in Wickenburg area, Maricopa and Yavapai counties, Ariz.
Published: (1938)

Recent progress in thawing of frozen gravel in placer mining.
Published: (1922)

Tables, ready cast up with great exactness, for the use of bankers, merchants, tradesmen, and others : Who may immediately, upon inspection, find the true value of any quantity of gold, from 3l. 10s. to 4l. 6s. per ounce; and silver, from 4s. to 8s, per ounce, from one grain to ten pounds weight. To which is prefixed, a table, which, at one view, will shew the value of any quantity of gold agreeable to the mint or coinage price of 3l. 17s. 10d. 29. per cz. with the specific weight of the English money which is allowed to pass current by the lords of the treasury, and practised by the Bank of England: also an account of gold and silver bultion; with tables for reducing of silver and gold of any fineness to standard weight, from one hundred thousand ounces to one grain. A work very necessary at all times for persons who are concerned in money transactions. The second edition, with additions. Inscribed to the bank directors, with a recommendatory preface, By Samuel Etheridge, of the Bullion Office, Bank of England.
by: Etheridge, Samuel
Published: (1791)

Dirty gold.
Published: (2016)

Gold and silver.
Published: (1920)

Gold and silver.
Published: (1919)

Gold and silver.
Published: (1920)

Federal placer-­mining laws and regulations; Small-scale placer-mining methods.
Published: (1938)

Methane in California gold mines.
Published: (1921)

Gold reserve.
Published: (1896)

Past Lode-Gold Production in Alaska.
Published: (1941)

Gold mining in New Mexico.
Published: (1938)

Gold mining in New Mexico.
Published: (1938)

British gold embargo.
Published: (1919)