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A method for the production of insoluble, only slightly swellable poly - n-vinyl pyrrolidone - (2) or copolymers of the poly - n - vinylpyrrolidone with other n - vinyllactams
A method for the production of insoluble, only slightly swellable poly - n-vinyl pyrrolidone - (2) or copolymers of the poly - n - vinylpyrrolidone with other n - vinyllactams
