Separtion of the rare earth elements by ion-exchange chromatography : I. The use of NH 4+—H+ development columns von Topp, N.E., Young, D.D.

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Separtion of the rare earth elements by ion-exchange chromatography von Topp, N.E., Young, D.D.

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Modern techniques for separating the rare-earth elements von Topp, N.E.

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The extraction of lanthanons with alkali metal amalgams—I von Barrett, M.F., Sweasey, D., Topp, N.E.

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The extraction of rare earth nitrates with tri-n-butyl phosphate (TBP) von Robinson, F.V., Topp, N.E.

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The extraction of lanthanos with alkali metal amalgams—III Studies of model systems von Barrett, M.F., Sweasey, D., Topp, N.E.

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The extraction of lanthanons with alkali metal amalgams—I: Samarium and ytterbium von Barrett, M.F., Sweasey, D., Topp, N.E.

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Double ammonium oxalates of the rare earths and yttrium von Barrett, M.F., McDonald, T.R.R., Topp, N.E.

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