1. The joint action of microbial insecticides in the cotton leafworm Spodoptera littoralis (Boisd.);Abdallah;Bull. Ent. Soc. Egypt., Econ. Ser.,1969
2. Feeding behaviour of the cotton leafworm Spodoptera littoralis (Boisd.) sublethally infected with Bacillus thuringiensis Berliner;Abdallah;Bull. Ent. Soc. Egypt., Econ. Ser.,1970
3. Isolation and pathogenicity of 3 varieties of Bacillus associated with diseased cotton worms in Egypt;Afify;Proc. Egypt. Acad. Sci.,1968
4. On tracing the response of some Egyptian cotton worms in different larval ages to Bacillus thuringiensis Berliner;Afify;Z. ang. Ent.,1969
5. Influence of pH on the growth of Bacillus thuringiensis;Arzumanov;Microbiology,1979