1. Tuberculin-negative tuberculosis;Mascher;Amer. Rev. Tuberc.,1951
2. Active pulmonary tuberculosis with negative tuberculin skin reactions;Kent;Amer. Rev. Resp. Dis.,1967
3. Zinsser Microbiology;Smith,1964
4. Quantitative tests with old tuberculin in sanatorium practice;Woodruff;Amer. Rev. Resp. Dis.,1968
5. An inquiry concerning the role of allergy, immunity and other factors of importance in the pathogenesis of human tuberculosis;Rich;Búa. Hopkins Hosp.,1929