Sleep at sea : a diary study of the effects of unattended machinery space watch duty

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      <subfield code="c">Lars Torsvall... [et al.]</subfield>
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      <subfield code="a">Forty-nine engineer officers in the Swedish merchant marine were asked to keep a sleep/wake diary during one tour of duty (1-3 months) on ocean.going container ships. The present study was intended to provide information on the effects of "watch duty with unattended machinery space" (WUMS) on self reported sleep and wakefulness</subfield>
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      <subfield code="g">Vol. 30, nº 9, September 1987 ; p. 1335-1340</subfield>
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