1. Prevalence of sleep disturbance in a primarily urban Florida county;Karacan;Soc Sci Med,1976
2. Cited by E Hartmann;National Survey on Drug Acquisition and Use,1970-71
3. Use of sedatives and occurrence of insomnia in persons aged 65 years and older residing in Groningen;Mulder;Ned T Gerontol,1976
4. Functional implications of changes in sleep physiology with age;Feinberg,1976