Nocardia and streptomyces : proceedings of the International Symposium on Nocardia and Streptomyces, Warsaw, October 4-8, 1976 - Kurylowicz, Wlodzimierz; Jeljaszewicz, J.; Mordarski, Marian (Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene : 1. Abt. : Supplemente ; 6, 1978)