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<dl><dd>Shows pictures of white rats of different ages and how they look when they reach a certain age.</dd>
<dd>"U.S. Government Printing Office: 1946--713108."</dd></dl><br>Subjects: Nutrition Research Posters; Animal models in research Posters; Rats Nutrition Posters; Rats Growth Posters; Rats as laboratory animals Posters; Nutrition; Animal models in research; Rats; Rats as laboratory animals</div>
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United States. Bureau of Human Nutrition and Home Economics</div>
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