Search Results       Your search for [subject]Chemical standards and controls returned 1 record.           SIGMA: biochemical and organic compounds for research and diagnostic clinical reagents. USA: SIGMA. Subject: Chemical chromatography; Biochemical handbook; Chemical equipment and supplies; Chemical standards and controls; Chemical research kits and reagents; Chemical diagnostic kits and reagents; Chemical automatic reagents-handbook.          Add to Book Cart Relevance: 22.90%