Sleepiness and sleep patterns among air traffic controllers and communications / 
Ricardo M. Salonga [and three others] 
<br/><br/>In: Acta Medica Philippina, 2007 vol 41 (2) pages: 59-67 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sleep<br/>Sleepiness<br/>Aviation
<br/><br/><label>Subjects--Index Terms: </label>Sleep Patterns