1. Acar JF & Goldstein FW (1986) Disk susceptibility test. In: Lorian V (Ed) Antibiotic in Laboratory Medicine. Williams & Wilkins, Baltimore
2. Alyan SA, Amin NE, Abdallah IS, Easa M El-S, Imam EA, Rizk MH & Alawy T (1985) Monogenetic trematode from gills ofSarotherodon niloticus in Upper Egypt. J. Egypt. Vet. Med. Assoc. 45: 117?126
3. Amend DF (1970) Myxobacterial infections of salmonids: prevention and treatment. In: Symposium of Diseases of fish and shellfish. Spec. Publ. Am. Fish. Soc. 5: 258?265
4. Anacker RL & Ordal EJ (1959) Studies of the myxobacteriumChondrococcus columnaris. I. Serological typing. J. Bacteriol. 78: 25?32
5. Avault JW, Shell EW & Smitherman RO (1968) Procedures for overwintering tilapia. FAO Fish. Rep. 44: 343?345