Biology of antibiotics [by] Hans Zähner and Werner K. Maas. Zähner, Hans, 1929- Maas, Werner Karl, 1921- joint author. Zähner, Hans, 1929- Biologie der Antibiotica. Antibiotics. QP801.A63 Z32 574 ZAB "Based on Hans Zähner's Biologie der Antibiotica ... 1965." Includes bibliographies. New York, Springer-Verlag, 1972. 1972. 1972 Text 125 p. eng Heidelberg science library, v. 4