The collection and processing of drug information in the National ambulatory medical care survey, United States, 1980

by Koch, Hugo K; Campbell, William H

Hyattsville, Md; Washington, D.C · U.S. Dept. of Health and Human Services, Public Health Services, Office of Health, Research, Statistics, and Technology, National Center for Health Statistics; For sale by Supt. of Docs., U.S. G.P.O · 1982