4
by Clark, P. J.
Published in Psychiatric Bulletin (1993)
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5
by CLARK, P. J.
Published in Science (1956)
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6
7
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8
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13
by Clark, P. J., Evans, F. C.
Published in Science (1955)
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14
16
17
18
20
by Evans, F. C., Clark, P. J., Brand, R. H.
Published in Ecology (1955)
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