Synthetic aspects of biologically active cyclic peptides : gramicidin S and tyrocidines / Nobuo Izumiya ... [et al.]. Izumiya, Nobuo. Cyclic peptides Synthesis. Gramicidins. Tyrocidines. Drugs Structure-activity relationships. QD431 .S98 1979 615.92 IZS "A Halsted Press book." Includes bibliographical references and index. Tokyo : Wiley, c1979. c1979. 1979 Text xii, 166 p. : eng Kodansha scientific books