Covariances for estimated totals when comparing between years / [Bean, JA, Hoffman, KL].
Imprint
Hyattsville, Md. (6525 Belcrest Rd., Hyattsville 20782) : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics, [1992]
"Results of a study to measure the degree of correlation between yearly estimates of totals for selected characteristics from the National Hospital Discharge Survey and the National Health Interview Survey."