Leyva, J. F. (1940). Biochemical studies on tuberculosis. I. The purified protein derivative of tuberculin: Its isolation by a simpler method and its probable chemica identity. s.n.].
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিLeyva, Jose F. Biochemical Studies on Tuberculosis. I. The Purified Protein Derivative of Tuberculin: Its Isolation by a Simpler Method and Its Probable Chemica Identity. [S.l: s.n.], 1940.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিLeyva, Jose F. Biochemical Studies on Tuberculosis. I. The Purified Protein Derivative of Tuberculin: Its Isolation by a Simpler Method and Its Probable Chemica Identity. s.n.], 1940.
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