Understanding the immune system / by Lydia Woods Schindler.

[Bethesda, Md.] : U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, 1993.

40 pages : color illustrations ; 24 cm.

Rev. Jan. 1993.

"... collaboration of the National Institute of Allergy and Infectious Diseases and the National Cancer Institute"--P. [2] of cover.