Al Hafedh، Y. S.، و Reagan، R. (1990). RESPONSE TO SELECfION FOR BODY LENGTH AND WEIGHT IN CHANNEL CATFISH (ICTALURUS PUNCTATUS) AT SIX MONTHS OF AGE AS GROWN IN EARTHEN PONDS (رسالة ماجستير غير منشورة). Mississippi State University، أكسفورد. مسترجع من http://search.mandumah.com/Record/618530
Al Hafedh، Yousef Saleh، و Rolو Reagan. "RESPONSE TO SELECfION FOR BODY LENGTH AND WEIGHT IN CHANNEL CATFISH (ICTALURUS PUNCTATUS) AT SIX MONTHS OF AGE AS GROWN IN EARTHEN PONDS" رسالة ماجستير. Mississippi State University، أكسفورد، 1990. مسترجع من http://search.mandumah.com/Record/618530