Streptonivicin, a new antibiotic. II. Isolation and characterization. - HOEKSEMA H; BERGY ME; JACKSON WG; SHELL JW; HINMAN JW; FONKEN AE; BOYACK GA; CARON EL; FORD JH; DEVRIES WH; CRUM GF (Antibiotics & chemotherapy (Northfield, Ill.), 1956)