Levy, J. A., Pan, L. Z., Beth-Giraldo, E., Kaminsky, L. S., Henle, G., Henle, W., & Giraldo, G. (1986). Absence of antibodies to the human immunodeficiency virus in sera from Africa prior to 1975.

Levy, J A., L Z. Pan, E. Beth-Giraldo, L S. Kaminsky, G. Henle, W. Henle, and G. Giraldo. Absence of Antibodies to the Human Immunodeficiency Virus in Sera From Africa Prior to 1975. 1986.

Levy, J A., et al. Absence of Antibodies to the Human Immunodeficiency Virus in Sera From Africa Prior to 1975. 1986.