File Manifest for ICPSR 9830 U.S. Dept. of Health and Human Services, National Center for Health Statistics. NATIONAL AMBULATORY MEDICAL CARE SURVEY, 1989 [Computer file]. Hyattsville, MD: U.S. Dept. of Health and Human Services, National Center for Health Statistics [producer], 1991. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1992. doi:10.3886/ICPSR09830 Study-level Documentation Filename Record Record Var. Date MD5 Length Count Count Updated Checksum 09830-related_literature.txt - - - 2009-11-28 - 09830-manifest.txt - - - 2009-11-29 - DS0001 National Ambulatory Medical Care Survey, 1989 Filename Record Record Var. Date MD5 Length Count Count Updated Checksum 09830-0001-Codebook.txt - - - 1994-06-08 379f80d75ea4a3bf526bb41c4400d891 09830-0001-Data.txt 153 38,384 unknown 1994-06-08 0356646940375d41fd0c88fbf11cd350