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Journal Article Subjective Characteristics of Sleep in the Elderly Get access P. Gerard, P. Gerard Search for other works by this author on: Oxford Academic PubMed Google Scholar K. J. Collins, K. J. Collins Search for other works by this author on: Oxford Academic PubMed Google Scholar C. Dore, C. Dore Search for other works by this author on: Oxford Academic PubMed Google Scholar A. N. Exton-Smith A. N. Exton-Smith Search for other works by this author on: Oxford Academic PubMed Google Scholar Age and Ageing, Volume 7, Issue suppl, 1978, Pages 55–63, https://doi.org/10.1093/ageing/7.suppl.55 Published: 01 June 1978
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Gerard et al. (1978) studied this question.
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