The influence of defective physique and unfavourable home environment on the intelligence of school children : being a statistical examination of the London County Council pioneer school survey / by David Heron.

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The influence of defective physique and unfavourable home environment on the intelligence of school children : being a statistical examination of the London County Council pioneer school survey / by David Heron. In copyright. Source: Wellcome Collection.

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This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.