3
by Clark, P. J.
Published in Psychiatric Bulletin (1993)
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4
by CLARK, P. J.
Published in Science (1956)
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9
by Clark, P. J., Evans, F. C.
Published in Science (1955)
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10
12
14
15
17
by Evans, F. C., Clark, P. J., Brand, R. H.
Published in Ecology (1955)
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