1
4
by Hoover, S. R.
Published in Science (1965)
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5
by Hoover, S. R.
Published in Journal of Education (1922)
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8
9
11
12
13
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14
by Hoover, S. R., Jasewicz, L. B., Porges, N.
Published in Science (1951)
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15
by Allison, F. E., Hoover, S. R., Burk, D.
Published in Science (1933)
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16
20
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