Excerpt from Separation and Purification Section<br/><br/>The citation of any commercial materials and equipment in this document is occasionally made only to specify procedures which were used, and does not imply recommendation or endorse ment by the National Bureau of Standards; nor does it imply the use of such material and equipment as the only suitable sources for the purpose at hand. Mrs. Janice Hurst, our Section secretary, eased the task of preparing this report and we gratefully acknowledge her patient skills in translating penscript, some of it legible.
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