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Cough as the reason for office visits National Ambulatory Medical Care Survey : United States, 1977-

Cypress, Beulah K.
[Hyattsville, Md.] : U.S. Dept. of Health and Human Services, Public Health Service, Office of Health Research, Statistics, and Technology, [1980] 1980

Expected principal source of payment for hospital discharges, United States, 1977

Pokras, Robert.
[Hyattsville, Md.] : U.S. Dept. of Health and Human Services, Public Health Service, Office of Health Research Statistics, and Technology, [1980] 1980