FIGURE 2. Regional distribution of forages and grain containing low, variable, or adequate levels of selenium in the United States and Canada.

FIGURE 2

Regional distribution of forages and grain containing low, variable, or adequate levels of selenium in the United States and Canada.

From: 3, Distribution

Cover of Selenium in Nutrition
Selenium in Nutrition: Revised Edition.
National Research Council (US) Subcommittee on Selenium.
Washington (DC): National Academies Press (US); 1983.
Copyright © National Academy of Sciences.

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