(Q39849006)
Statements
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An etiological survey of the severely retarded Hertfordshire children who were born between January 1, 1965 and December 31, 1967 (English)
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R. Laxova
M. A. Ridler
M. Bowen-Bravery
1 January 1977
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1
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1
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75-86
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Identifiers
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