Avian leukosis and Marek's disease
Treść karty:517,487 NEDYALKOV St. /red./ Avian leukosis and Marek's disease. Symposium Sofia October 12-14,1970 reports and communications.Editorial board: Z.Mladenov, St. Hedyalkov and N.Sotirov. Sofia 1972 Publishing House of the Bulgarian Academy of Sciences 8° s. 263, nlb.1,tabl.30.