TY  - BOOK
AU  - Tukey J W
TI  - lack of sensitization following repeated skin tests with standard tuberculin (PPD-S)
U1  - 000SB:616.995 
KW  - Sensitization
KW  - Skin tests
N1  - Reprint from the American Review of Tuberculosis v.62, no.1-A ; July 1950 ; p.77-86
ER  -