20. Schaad, W. 2001. Laboratory guide for identification of plant pathogenic bacteria. Schaad [Hrsg.]. ‒ 3. ed.; St. Paul, Minnesota:, 373 pp.
20. Schaad, W. 2001. Laboratory guide for identification of plant pathogenic bacteria. Schaad [Hrsg.]. ‒ 3. ed.; St. Paul, Minnesota:, 373 pp.