National Research Council (U.S.). Committee on Environmental Epidemiology & ebrary, Inc. (1997). Use of gray literature and other data in environmental epidemiology. National Academy of Sciences.
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Chicago-čujuhus (17. p.)
National Research Council (U.S.). Committee on Environmental Epidemiology juo Inc ebrary. Use of Gray Literature and Other Data in Environmental Epidemiology. Washington, D.C.: National Academy of Sciences, 1997.
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MLA-čujuhus (9. p.)
National Research Council (U.S.). Committee on Environmental Epidemiology juo Inc ebrary. Use of Gray Literature and Other Data in Environmental Epidemiology. National Academy of Sciences, 1997.
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