1. A virus disease and introduced parasites as factors controlling the European spruce sawfly, Diprion hercyniae (Htg.) in central New Brunswick.;Bird;Can. Entomol.,1957
2. Validity of the insecticidal check method as a measure of the effectiveness of natural enemies of diaspine scale insects.;DeBach;J. Econ. Entomol.,1955
3. Biological control of diaspine scale insects on citrus in California.;DeBach;Proc. 1st Int. Citrus Symp. Riverside, Calif.,1969
4. Methods of colonization, recovery and evaluation.;DeBach,1964
5. Experimental techniques for evaluation of the effectiveness of natural enemies.;DeBach,1971