1. The challenge is AIDS Publication: [United States?]: Beckman, [199-?] Subject(s): Acquired Immunodeficiency Syndrome -- prevention & controlCellular Structures
2. [Bisected single helix] Publication: Lyons : Institut Mérieux, [199-?] Subject(s): HIVCellular Structures
3. Third International Symposium on Chromaffin Cell Biology: Coolfont, Berkeley Springs, West Virginia, May 4-9, 1986 Author(s): International Symposium on Chromaffin Cell Biology 1986 : Coolfont, W. Va.) Publication: [Bethesda, Md. : Medical Arts and Photography Branch, National Institutes of Health], 1986 Subject(s): Chromaffin CellsCellular Structures