. . . . . . . . . . . "Development document for effluent limitations guidelines and new source performance standards for the unbleached kraft and semichemical pulp segment of the pulp, paper, and paperboard mills point source category" . . "Unbleached kraft and semichemical pulp segment of the pulp, paper, and paperboard mills"@en . . . . . "Development document for effluent limitations guidelines and new source performance standards for the unbleached kraft and semichemical pulp segment of the pulp, paper and paperboard mills point source category/U. S. Environmental Protection Agency, Effluent Guideline Division; Craig Vogt, project officer"@en . . . "Development document for effluent limitations guidelines and new source performance standards for the unbleached kraft and semichemical pulp segment of the pulp, paper and paperboard mills point source category"@en . . . . "Unbleached kraft and semichemical pulp"@en . . . .