Analytical methods used in geochemical exploration by the US Geological Survey

/ By F.N. Ward, H.W.Lakin, F.C. Canney, and others

On the morphology and classification of the brachiopodsuborder Chonetoidea

Muir-Wood, Helen M. (Helen Marguerite)

Mine environment and management

Chaudhuri, A. B.(Amal Bhushan),1926-

A concise history of mining

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Poster Light Micrograph Pollen Identification Reference