Search Results - Lawrence, H. M.

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  1. 1
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    Increased rcoveries of phosphate in the land-pebble district of Florida / by Lawrence, H. M.

    Published 1930
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    Government Document Book

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  2. 2
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    Flotation of low-grade phosphate ores. by Lawrence, H. M.

    Published 1931
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  3. 3
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    Flotation of low-grade phosphate ores / by Lawrence, H. M.

    Published 1928
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  4. 4
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    Gravity concentration on certain Florida phosphatic sands / by Lawrence, H. M.

    Published 1930
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