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- [2] INTERLABORATORY QUALITY CONTROL STUDY NO. 18. TOTAL MERCURY IN SEDIMENTS. Canada, Inland Waters Branch, Report Series, 1979, (61):
- [3] INTERLABORATORY QUALITY CONTROL STUDY NO. 19 - TOTAL MERCURY IN WATER, LOW-LEVEL CONCENTRATIONS. Canada, Inland Waters Branch, Report Series, 1979, (62):
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