Anorganische Nichtmetallische Minerale Und Mitteilung 22 Der Senatskommission Für (Mitteilung / Senatskommission fur Geowissenschaftliche Gemeinschaftsforschung)

1977 census of manufactures

United States. Bureau of the Census

Summary of trade and tariff information

United States International Trade Commission.

Statistics of coal

Richard Cowling Taylor

Atlas of Mineral Resources of the Escap Region

Economic & Social Commission for Asia & the Pacific

Zeta-Potentiale und Flotierbarkeit von Mineralen

Paul Ney

Industrial minerals

Peter W. Harben

Draft environmental impact statement

Montana. Department of State Lands

Mineral Facts of China

Xun Zhu

Industrial minerals and rocks

Miloš Kužvart