31. T helper cells: genes and development Publication: [Bethesda, Md. : Medical Arts and Photography Branch, National Institutes of Health, 2000] Subject(s): T-Lymphocytes, Helper-Inducer -- physiologyGenes
32. How America knows what America needs Publication: [Washington, DC] : U.S. Census Bureau, [2000?] Subject(s): CensusesCultural DiversityPaintings