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Annual report of the nonmetals division, fiscal year 1940
Report of the nonmetals division, fiscal year 1941
Lamellar grading of powdered mica
Contact potential in electrostatic separation
An electrostatic separator for fine powders
Report of the Nonmetals Division: Fiscal Year 1942
Fluorescent minerals used in lighting and elsewhere
Perlite, source of synthetic pumice
Dielectric constant in air-ambient electrostatic separation