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US2597504A
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Method of extracting uranium from bituminous shales and shale culm containing uranium
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GB634357A
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Improved method of removing water from concentrates of oil shales and similar moist materials
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GB283187A
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Method of treating raw phosphate and the like
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GB282704A
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Method of treating raw phosphate and other materials containing insoluble calcium phosphate
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GB282619A
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Method of producing soluble phosphate fertilisers
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GB283908A
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Method of producing mixed manures
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GB282330A
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Method of producing mixed manures
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GB276295A
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Method of oxidising ammonia by means of oxygen
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GB275843A
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Method of producing a mixed manure containing phosphoric acid and nitrogen
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GB252953A
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Improved method of producing concentrated phosphoric acid
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GB189789A
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Improved method of producing gas
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CA468282A
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Methods of removing water from concentrates of oil shales and similar moist materials
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CA467953A
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Methods of treating concentrates of oil shale
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