| http://www.w3.org/ns/prov#value | - sins are described throughout the literature and in particular in Ion Exchange, Nachod, Academic Press, Inc, New York (1950); Ion Exchange Resins, Kunin and Myers, John Wiley & Sons, Inc, New York (1950); Styrene, Its Polymers and Copolymers and Derivatives, Boundy and Boyer, Reinhold, New York (1950); and in U .S. patents such as 2,366,007DAlelio; 2,366,008- DAlelio; 2,663,702Kropa; 2,664,397Hutc
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