The mineral industry of the British empire and foreign countries. Statistics, 1919-1921. Diatomaceous earth.

At head of title: Imperial mineral resources bureau.

The mineral industry of the British Empire and foreign countries. Diatomaceous earth.

Bibliography: p. 51-55.

The mineral industry of the British empire and foreign countries. Statistics, 1920-1922. Diatomaceous earth.

At head of title: Imperial mineral resources bureau.

Water filtration for asbestos fiber removal /

EPA-600/2-79-206.