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British Medical Journal (Clinical Research Ed.) logoLink to British Medical Journal (Clinical Research Ed.)
. 1987 Mar 28;294(6575):828–830. doi: 10.1136/bmj.294.6575.828

ABC of 1 to 7 (revised). Sleep problems.

H B Valman
PMCID: PMC1245877  PMID: 3105760

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